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[perl5.git] / pp_ctl.c
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a0d0e21e
LW		 1/* pp_ctl.c
2 *
1129b882
NC		 3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
a0d0e21e
LW		 5 *
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8 *
9 */
10
11/*
4ac71550
TC		 12 * Now far ahead the Road has gone,
13 * And I must follow, if I can,
14 * Pursuing it with eager feet,
15 * Until it joins some larger way
16 * Where many paths and errands meet.
17 * And whither then? I cannot say.
18 *
19 * [Bilbo on p.35 of _The Lord of the Rings_, I/i: "A Long-Expected Party"]
a0d0e21e
LW		 20 */
21
166f8a29
DM		 22/* This file contains control-oriented pp ("push/pop") functions that
23 * execute the opcodes that make up a perl program. A typical pp function
24 * expects to find its arguments on the stack, and usually pushes its
25 * results onto the stack, hence the 'pp' terminology. Each OP structure
26 * contains a pointer to the relevant pp_foo() function.
27 *
28 * Control-oriented means things like pp_enteriter() and pp_next(), which
29 * alter the flow of control of the program.
30 */
31
32
a0d0e21e 33#include "EXTERN.h"
864dbfa3 34#define PERL_IN_PP_CTL_C
a0d0e21e
LW		 35#include "perl.h"
36
37#ifndef WORD_ALIGN
dea28490 38#define WORD_ALIGN sizeof(U32)
a0d0e21e
LW		 39#endif
40
54310121 41#define DOCATCH(o) ((CATCH_GET == TRUE) ? docatch(o) : (o))
1e422769 42
94fcd414
NC		 43#define dopoptosub(plop) dopoptosub_at(cxstack, (plop))
44
a0d0e21e
LW		 45PP(pp_wantarray)
46{
97aff369 47 dVAR;
39644a26 48 dSP;
a0d0e21e
LW		 49 I32 cxix;
50 EXTEND(SP, 1);
51
52 cxix = dopoptosub(cxstack_ix);
53 if (cxix < 0)
54 RETPUSHUNDEF;
55
54310121 56 switch (cxstack[cxix].blk_gimme) {
57 case G_ARRAY:
a0d0e21e 58 RETPUSHYES;
54310121 59 case G_SCALAR:
a0d0e21e 60 RETPUSHNO;
54310121 61 default:
62 RETPUSHUNDEF;
63 }
a0d0e21e
LW		 64}
65
2cd61cdb
IZ		 66PP(pp_regcreset)
67{
97aff369 68 dVAR;
2cd61cdb
IZ		 69 /* XXXX Should store the old value to allow for tie/overload - and
70 restore in regcomp, where marked with XXXX. */
3280af22 71 PL_reginterp_cnt = 0;
0b4182de 72 TAINT_NOT;
2cd61cdb
IZ		 73 return NORMAL;
74}
75
b3eb6a9b
GS		 76PP(pp_regcomp)
77{
97aff369 78 dVAR;
39644a26 79 dSP;
a0d0e21e 80 register PMOP *pm = (PMOP*)cLOGOP->op_other;
a0d0e21e 81 SV *tmpstr;
84679df5 82 REGEXP *re = NULL;
bfed75c6 83
4b5a0d1c 84 /* prevent recompiling under /o and ithreads. */
3db8f154 85#if defined(USE_ITHREADS)
131b3ad0
DM		 86 if (pm->op_pmflags & PMf_KEEP && PM_GETRE(pm)) {
87 if (PL_op->op_flags & OPf_STACKED) {
88 dMARK;
89 SP = MARK;
90 }
91 else
92 (void)POPs;
93 RETURN;
94 }
513629ba 95#endif
d4b87e75
BM		 96
97#define tryAMAGICregexp(rx) \
98 STMT_START { \
6f1401dc 99 SvGETMAGIC(rx); \
d4b87e75
BM		 100 if (SvROK(rx) && SvAMAGIC(rx)) { \
101 SV *sv = AMG_CALLun(rx, regexp); \
102 if (sv) { \
103 if (SvROK(sv)) \
104 sv = SvRV(sv); \
105 if (SvTYPE(sv) != SVt_REGEXP) \
106 Perl_croak(aTHX_ "Overloaded qr did not return a REGEXP"); \
107 rx = sv; \
108 } \
109 } \
110 } STMT_END
111
112
131b3ad0
DM		 113 if (PL_op->op_flags & OPf_STACKED) {
114 /* multiple args; concatentate them */
115 dMARK; dORIGMARK;
116 tmpstr = PAD_SV(ARGTARG);
76f68e9b 117 sv_setpvs(tmpstr, "");
131b3ad0 118 while (++MARK <= SP) {
d4b87e75 119 SV *msv = *MARK;
79a8d529 120 SV *sv;
d4b87e75 121
79a8d529 122 tryAMAGICregexp(msv);
d4b87e75 123
79a8d529
DM		 124 if ((SvAMAGIC(tmpstr) || SvAMAGIC(msv)) &&
125 (sv = amagic_call(tmpstr, msv, concat_amg, AMGf_assign)))
126 {
127 sv_setsv(tmpstr, sv);
128 continue;
131b3ad0 129 }
d4b87e75 130 sv_catsv(tmpstr, msv);
131b3ad0
DM		 131 }
132 SvSETMAGIC(tmpstr);
133 SP = ORIGMARK;
134 }
d4b87e75 135 else {
131b3ad0 136 tmpstr = POPs;
d4b87e75
BM		 137 tryAMAGICregexp(tmpstr);
138 }
139
140#undef tryAMAGICregexp
513629ba 141
b3eb6a9b 142 if (SvROK(tmpstr)) {
d8f6592e 143 SV * const sv = SvRV(tmpstr);
5c35adbb 144 if (SvTYPE(sv) == SVt_REGEXP)
d2f13c59 145 re = (REGEXP*) sv;
c277df42 146 }
d4b87e75
BM		 147 else if (SvTYPE(tmpstr) == SVt_REGEXP)
148 re = (REGEXP*) tmpstr;
149
5c35adbb 150 if (re) {
69dc4b30
FC		 151 /* The match's LHS's get-magic might need to access this op's reg-
152 exp (as is sometimes the case with $'; see bug 70764). So we
153 must call get-magic now before we replace the regexp. Hopeful-
154 ly this hack can be replaced with the approach described at
155 http://www.nntp.perl.org/group/perl.perl5.porters/2007/03
156 /msg122415.html some day. */
455d9033
FC		 157 if(pm->op_type == OP_MATCH) {
158 SV *lhs;
159 const bool was_tainted = PL_tainted;
160 if (pm->op_flags & OPf_STACKED)
69dc4b30 161 lhs = TOPs;
455d9033
FC		 162 else if (pm->op_private & OPpTARGET_MY)
163 lhs = PAD_SV(pm->op_targ);
164 else lhs = DEFSV;
165 SvGETMAGIC(lhs);
166 /* Restore the previous value of PL_tainted (which may have been
167 modified by get-magic), to avoid incorrectly setting the
168 RXf_TAINTED flag further down. */
169 PL_tainted = was_tainted;
170 }
69dc4b30 171
f0826785 172 re = reg_temp_copy(NULL, re);
aaa362c4 173 ReREFCNT_dec(PM_GETRE(pm));
28d8d7f4 174 PM_SETRE(pm, re);
c277df42
IZ		 175 }
176 else {
f3ec07c7
DM		 177 STRLEN len = 0;
178 const char *t = SvOK(tmpstr) ? SvPV_nomg_const(tmpstr, len) : "";
179
c737faaf 180 re = PM_GETRE(pm);
14a49a24 181 assert (re != (REGEXP*) &PL_sv_undef);
c277df42 182
20408e3c 183 /* Check against the last compiled regexp. */
a11c8683 184 if (!re || !RX_PRECOMP(re) || RX_PRELEN(re) != len ||
220fc49f 185 memNE(RX_PRECOMP(re), t, len))
85aff577 186 {
07bc277f 187 const regexp_engine *eng = re ? RX_ENGINE(re) : NULL;
c737faaf 188 U32 pm_flags = pm->op_pmflags & PMf_COMPILETIME;
d8f6592e
AL		 189 if (re) {
190 ReREFCNT_dec(re);
14a49a24
NC		 191#ifdef USE_ITHREADS
192 PM_SETRE(pm, (REGEXP*) &PL_sv_undef);
193#else
4608196e 194 PM_SETRE(pm, NULL); /* crucial if regcomp aborts */
14a49a24 195#endif
1e2e3d02
YO		 196 } else if (PL_curcop->cop_hints_hash) {
197 SV *ptr = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash, 0,
198 "regcomp", 7, 0, 0);
199 if (ptr && SvIOK(ptr) && SvIV(ptr))
200 eng = INT2PTR(regexp_engine*,SvIV(ptr));
c277df42 201 }
664e119d 202
533c011a 203 if (PL_op->op_flags & OPf_SPECIAL)
3280af22 204 PL_reginterp_cnt = I32_MAX; /* Mark as safe. */
a0d0e21e 205
b9ad30b4
NC		 206 if (DO_UTF8(tmpstr)) {
207 assert (SvUTF8(tmpstr));
208 } else if (SvUTF8(tmpstr)) {
209 /* Not doing UTF-8, despite what the SV says. Is this only if
210 we're trapped in use 'bytes'? */
211 /* Make a copy of the octet sequence, but without the flag on,
212 as the compiler now honours the SvUTF8 flag on tmpstr. */
213 STRLEN len;
214 const char *const p = SvPV(tmpstr, len);
215 tmpstr = newSVpvn_flags(p, len, SVs_TEMP);
216 }
f3ec07c7
DM		 217 else if (SvAMAGIC(tmpstr)) {
218 /* make a copy to avoid extra stringifies */
0479a84a 219 tmpstr = newSVpvn_flags(t, len, SVs_TEMP | SvUTF8(tmpstr));
f3ec07c7 220 }
c737faaf 221
5a8697a7 222 if (eng)
3ab4a224 223 PM_SETRE(pm, CALLREGCOMP_ENG(eng, tmpstr, pm_flags));
5a8697a7 224 else
3ab4a224 225 PM_SETRE(pm, CALLREGCOMP(tmpstr, pm_flags));
c737faaf 226
f86aaa29 227 PL_reginterp_cnt = 0; /* XXXX Be extra paranoid - needed
2cd61cdb 228 inside tie/overload accessors. */
c277df42 229 }
4633a7c4 230 }
c737faaf
YO		 231
232 re = PM_GETRE(pm);
a0d0e21e 233
72311751 234#ifndef INCOMPLETE_TAINTS
3280af22
NIS		 235 if (PL_tainting) {
236 if (PL_tainted)
07bc277f 237 RX_EXTFLAGS(re) |= RXf_TAINTED;
72311751 238 else
07bc277f 239 RX_EXTFLAGS(re) &= ~RXf_TAINTED;
72311751
GS		 240 }
241#endif
242
220fc49f 243 if (!RX_PRELEN(PM_GETRE(pm)) && PL_curpm)
3280af22 244 pm = PL_curpm;
a0d0e21e 245
c737faaf
YO		 246
247#if !defined(USE_ITHREADS)
248 /* can't change the optree at runtime either */
249 /* PMf_KEEP is handled differently under threads to avoid these problems */
a0d0e21e 250 if (pm->op_pmflags & PMf_KEEP) {
c90c0ff4 251 pm->op_private &= ~OPpRUNTIME; /* no point compiling again */
533c011a 252 cLOGOP->op_first->op_next = PL_op->op_next;
a0d0e21e 253 }
c737faaf 254#endif
a0d0e21e
LW		 255 RETURN;
256}
257
258PP(pp_substcont)
259{
97aff369 260 dVAR;
39644a26 261 dSP;
c09156bb 262 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
901017d6
AL		 263 register PMOP * const pm = (PMOP*) cLOGOP->op_other;
264 register SV * const dstr = cx->sb_dstr;
a0d0e21e
LW		 265 register char *s = cx->sb_s;
266 register char *m = cx->sb_m;
267 char *orig = cx->sb_orig;
901017d6 268 register REGEXP * const rx = cx->sb_rx;
c445ea15 269 SV *nsv = NULL;
988e6e7e 270 REGEXP *old = PM_GETRE(pm);
f410a211
NC		 271
272 PERL_ASYNC_CHECK();
273
988e6e7e 274 if(old != rx) {
bfed75c6 275 if(old)
988e6e7e 276 ReREFCNT_dec(old);
d6106309 277 PM_SETRE(pm,ReREFCNT_inc(rx));
d8f2cf8a
AB		 278 }
279
d9f97599 280 rxres_restore(&cx->sb_rxres, rx);
01b35787 281 RX_MATCH_UTF8_set(rx, DO_UTF8(cx->sb_targ));
c90c0ff4 282
a0d0e21e 283 if (cx->sb_iters++) {
a3b680e6 284 const I32 saviters = cx->sb_iters;
a0d0e21e 285 if (cx->sb_iters > cx->sb_maxiters)
cea2e8a9 286 DIE(aTHX_ "Substitution loop");
a0d0e21e 287
447ee134
DM		 288 SvGETMAGIC(TOPs); /* possibly clear taint on $1 etc: #67962 */
289
48c036b1
GS		 290 if (!(cx->sb_rxtainted & 2) && SvTAINTED(TOPs))
291 cx->sb_rxtainted |= 2;
447ee134 292 sv_catsv_nomg(dstr, POPs);
2c296965
YO		 293 /* XXX: adjust for positive offsets of \G for instance s/(.)\G//g with positive pos() */
294 s -= RX_GOFS(rx);
a0d0e21e
LW		 295
296 /* Are we done */
2c296965
YO		 297 if (CxONCE(cx) || s < orig ||
298 !CALLREGEXEC(rx, s, cx->sb_strend, orig,
299 (s == m) + RX_GOFS(rx), cx->sb_targ, NULL,
300 ((cx->sb_rflags & REXEC_COPY_STR)
301 ? (REXEC_IGNOREPOS|REXEC_NOT_FIRST)
302 : (REXEC_COPY_STR|REXEC_IGNOREPOS|REXEC_NOT_FIRST))))
a0d0e21e 303 {
823a54a3 304 SV * const targ = cx->sb_targ;
748a9306 305
078c425b
JH		 306 assert(cx->sb_strend >= s);
307 if(cx->sb_strend > s) {
308 if (DO_UTF8(dstr) && !SvUTF8(targ))
309 sv_catpvn_utf8_upgrade(dstr, s, cx->sb_strend - s, nsv);
310 else
311 sv_catpvn(dstr, s, cx->sb_strend - s);
312 }
48c036b1 313 cx->sb_rxtainted |= RX_MATCH_TAINTED(rx);
9212bbba 314
f8c7b90f 315#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC		 316 if (SvIsCOW(targ)) {
317 sv_force_normal_flags(targ, SV_COW_DROP_PV);
318 } else
319#endif
320 {
8bd4d4c5 321 SvPV_free(targ);
ed252734 322 }
f880fe2f 323 SvPV_set(targ, SvPVX(dstr));
748a9306
LW		 324 SvCUR_set(targ, SvCUR(dstr));
325 SvLEN_set(targ, SvLEN(dstr));
1aa99e6b
IH		 326 if (DO_UTF8(dstr))
327 SvUTF8_on(targ);
6136c704 328 SvPV_set(dstr, NULL);
48c036b1
GS		 329
330 TAINT_IF(cx->sb_rxtainted & 1);
4f4d7508
DC		 331 if (pm->op_pmflags & PMf_NONDESTRUCT)
332 PUSHs(targ);
333 else
334 mPUSHi(saviters - 1);
48c036b1 335
ffc61ed2 336 (void)SvPOK_only_UTF8(targ);
48c036b1 337 TAINT_IF(cx->sb_rxtainted);
a0d0e21e 338 SvSETMAGIC(targ);
9212bbba 339 SvTAINT(targ);
5cd24f17 340
4633a7c4 341 LEAVE_SCOPE(cx->sb_oldsave);
a0d0e21e
LW		 342 POPSUBST(cx);
343 RETURNOP(pm->op_next);
344 }
8e5e9ebe 345 cx->sb_iters = saviters;
a0d0e21e 346 }
07bc277f 347 if (RX_MATCH_COPIED(rx) && RX_SUBBEG(rx) != orig) {
a0d0e21e
LW		 348 m = s;
349 s = orig;
07bc277f 350 cx->sb_orig = orig = RX_SUBBEG(rx);
a0d0e21e
LW		 351 s = orig + (m - s);
352 cx->sb_strend = s + (cx->sb_strend - m);
353 }
07bc277f 354 cx->sb_m = m = RX_OFFS(rx)[0].start + orig;
db79b45b 355 if (m > s) {
bfed75c6 356 if (DO_UTF8(dstr) && !SvUTF8(cx->sb_targ))
db79b45b
JH		 357 sv_catpvn_utf8_upgrade(dstr, s, m - s, nsv);
358 else
359 sv_catpvn(dstr, s, m-s);
360 }
07bc277f 361 cx->sb_s = RX_OFFS(rx)[0].end + orig;
084916e3 362 { /* Update the pos() information. */
44f8325f 363 SV * const sv = cx->sb_targ;
084916e3 364 MAGIC *mg;
7a7f3e45 365 SvUPGRADE(sv, SVt_PVMG);
14befaf4 366 if (!(mg = mg_find(sv, PERL_MAGIC_regex_global))) {
d83f0a82 367#ifdef PERL_OLD_COPY_ON_WRITE
51a9ea20 368 if (SvIsCOW(sv))
d83f0a82
NC		 369 sv_force_normal_flags(sv, 0);
370#endif
371 mg = sv_magicext(sv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
372 NULL, 0);
084916e3 373 }
ce474962 374 mg->mg_len = m - orig;
084916e3 375 }
988e6e7e 376 if (old != rx)
d6106309 377 (void)ReREFCNT_inc(rx);
d9f97599
GS		 378 cx->sb_rxtainted |= RX_MATCH_TAINTED(rx);
379 rxres_save(&cx->sb_rxres, rx);
29f2e912 380 RETURNOP(pm->op_pmstashstartu.op_pmreplstart);
a0d0e21e
LW		 381}
382
c90c0ff4 383void
864dbfa3 384Perl_rxres_save(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4 385{
386 UV *p = (UV*)*rsp;
387 U32 i;
7918f24d
NC		 388
389 PERL_ARGS_ASSERT_RXRES_SAVE;
96a5add6 390 PERL_UNUSED_CONTEXT;
c90c0ff4 391
07bc277f 392 if (!p || p[1] < RX_NPARENS(rx)) {
f8c7b90f 393#ifdef PERL_OLD_COPY_ON_WRITE
07bc277f 394 i = 7 + RX_NPARENS(rx) * 2;
ed252734 395#else
07bc277f 396 i = 6 + RX_NPARENS(rx) * 2;
ed252734 397#endif
c90c0ff4 398 if (!p)
a02a5408 399 Newx(p, i, UV);
c90c0ff4 400 else
401 Renew(p, i, UV);
402 *rsp = (void*)p;
403 }
404
07bc277f 405 *p++ = PTR2UV(RX_MATCH_COPIED(rx) ? RX_SUBBEG(rx) : NULL);
cf93c79d 406 RX_MATCH_COPIED_off(rx);
c90c0ff4 407
f8c7b90f 408#ifdef PERL_OLD_COPY_ON_WRITE
bdd9a1b1
NC		 409 *p++ = PTR2UV(RX_SAVED_COPY(rx));
410 RX_SAVED_COPY(rx) = NULL;
ed252734
NC		 411#endif
412
07bc277f 413 *p++ = RX_NPARENS(rx);
c90c0ff4 414
07bc277f
NC		 415 *p++ = PTR2UV(RX_SUBBEG(rx));
416 *p++ = (UV)RX_SUBLEN(rx);
417 for (i = 0; i <= RX_NPARENS(rx); ++i) {
418 *p++ = (UV)RX_OFFS(rx)[i].start;
419 *p++ = (UV)RX_OFFS(rx)[i].end;
c90c0ff4 420 }
421}
422
9c105995
NC		 423static void
424S_rxres_restore(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4 425{
426 UV *p = (UV*)*rsp;
427 U32 i;
7918f24d
NC		 428
429 PERL_ARGS_ASSERT_RXRES_RESTORE;
96a5add6 430 PERL_UNUSED_CONTEXT;
c90c0ff4 431
ed252734 432 RX_MATCH_COPY_FREE(rx);
cf93c79d 433 RX_MATCH_COPIED_set(rx, *p);
c90c0ff4 434 *p++ = 0;
435
f8c7b90f 436#ifdef PERL_OLD_COPY_ON_WRITE
bdd9a1b1
NC		 437 if (RX_SAVED_COPY(rx))
438 SvREFCNT_dec (RX_SAVED_COPY(rx));
439 RX_SAVED_COPY(rx) = INT2PTR(SV*,*p);
ed252734
NC		 440 *p++ = 0;
441#endif
442
07bc277f 443 RX_NPARENS(rx) = *p++;
c90c0ff4 444
07bc277f
NC		 445 RX_SUBBEG(rx) = INT2PTR(char*,*p++);
446 RX_SUBLEN(rx) = (I32)(*p++);
447 for (i = 0; i <= RX_NPARENS(rx); ++i) {
448 RX_OFFS(rx)[i].start = (I32)(*p++);
449 RX_OFFS(rx)[i].end = (I32)(*p++);
c90c0ff4 450 }
451}
452
9c105995
NC		 453static void
454S_rxres_free(pTHX_ void **rsp)
c90c0ff4 455{
44f8325f 456 UV * const p = (UV*)*rsp;
7918f24d
NC		 457
458 PERL_ARGS_ASSERT_RXRES_FREE;
96a5add6 459 PERL_UNUSED_CONTEXT;
c90c0ff4 460
461 if (p) {
94010e71
NC		 462#ifdef PERL_POISON
463 void *tmp = INT2PTR(char*,*p);
464 Safefree(tmp);
465 if (*p)
7e337ee0 466 PoisonFree(*p, 1, sizeof(*p));
94010e71 467#else
56431972 468 Safefree(INT2PTR(char*,*p));
94010e71 469#endif
f8c7b90f 470#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC		 471 if (p[1]) {
472 SvREFCNT_dec (INT2PTR(SV*,p[1]));
473 }
474#endif
c90c0ff4 475 Safefree(p);
4608196e 476 *rsp = NULL;
c90c0ff4 477 }
478}
479
a0d0e21e
LW		 480PP(pp_formline)
481{
97aff369 482 dVAR; dSP; dMARK; dORIGMARK;
823a54a3 483 register SV * const tmpForm = *++MARK;
dea28490 484 register U32 *fpc;
a0d0e21e 485 register char *t;
245d4a47 486 const char *f;
a0d0e21e 487 register I32 arg;
c445ea15
AL		 488 register SV *sv = NULL;
489 const char *item = NULL;
9c5ffd7c
JH		 490 I32 itemsize = 0;
491 I32 fieldsize = 0;
a0d0e21e 492 I32 lines = 0;
c445ea15
AL		 493 bool chopspace = (strchr(PL_chopset, ' ') != NULL);
494 const char *chophere = NULL;
495 char *linemark = NULL;
65202027 496 NV value;
9c5ffd7c 497 bool gotsome = FALSE;
a0d0e21e 498 STRLEN len;
823a54a3 499 const STRLEN fudge = SvPOK(tmpForm)
24c89738 500 ? (SvCUR(tmpForm) * (IN_BYTES ? 1 : 3) + 1) : 0;
1bd51a4c
IH		 501 bool item_is_utf8 = FALSE;
502 bool targ_is_utf8 = FALSE;
c445ea15 503 SV * nsv = NULL;
cbbf8932 504 OP * parseres = NULL;
bfed75c6 505 const char *fmt;
a0d0e21e 506
76e3520e 507 if (!SvMAGICAL(tmpForm) || !SvCOMPILED(tmpForm)) {
445b3f51
GS		 508 if (SvREADONLY(tmpForm)) {
509 SvREADONLY_off(tmpForm);
a1b95068 510 parseres = doparseform(tmpForm);
445b3f51
GS		 511 SvREADONLY_on(tmpForm);
512 }
513 else
a1b95068
WL		 514 parseres = doparseform(tmpForm);
515 if (parseres)
516 return parseres;
a0d0e21e 517 }
3280af22 518 SvPV_force(PL_formtarget, len);
1bd51a4c
IH		 519 if (DO_UTF8(PL_formtarget))
520 targ_is_utf8 = TRUE;
a0ed51b3 521 t = SvGROW(PL_formtarget, len + fudge + 1); /* XXX SvCUR bad */
a0d0e21e 522 t += len;
245d4a47 523 f = SvPV_const(tmpForm, len);
a0d0e21e 524 /* need to jump to the next word */
245d4a47 525 fpc = (U32*)(f + len + WORD_ALIGN - SvCUR(tmpForm) % WORD_ALIGN);
a0d0e21e
LW		 526
527 for (;;) {
528 DEBUG_f( {
bfed75c6 529 const char *name = "???";
a0d0e21e
LW		 530 arg = -1;
531 switch (*fpc) {
532 case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break;
533 case FF_BLANK: arg = fpc[1]; name = "BLANK"; break;
534 case FF_SKIP: arg = fpc[1]; name = "SKIP"; break;
535 case FF_FETCH: arg = fpc[1]; name = "FETCH"; break;
536 case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break;
537
538 case FF_CHECKNL: name = "CHECKNL"; break;
539 case FF_CHECKCHOP: name = "CHECKCHOP"; break;
540 case FF_SPACE: name = "SPACE"; break;
541 case FF_HALFSPACE: name = "HALFSPACE"; break;
542 case FF_ITEM: name = "ITEM"; break;
543 case FF_CHOP: name = "CHOP"; break;
544 case FF_LINEGLOB: name = "LINEGLOB"; break;
545 case FF_NEWLINE: name = "NEWLINE"; break;
546 case FF_MORE: name = "MORE"; break;
547 case FF_LINEMARK: name = "LINEMARK"; break;
548 case FF_END: name = "END"; break;
bfed75c6 549 case FF_0DECIMAL: name = "0DECIMAL"; break;
a1b95068 550 case FF_LINESNGL: name = "LINESNGL"; break;
a0d0e21e
LW		 551 }
552 if (arg >= 0)
bf49b057 553 PerlIO_printf(Perl_debug_log, "%-16s%ld\n", name, (long) arg);
a0d0e21e 554 else
bf49b057 555 PerlIO_printf(Perl_debug_log, "%-16s\n", name);
5f80b19c 556 } );
a0d0e21e
LW		 557 switch (*fpc++) {
558 case FF_LINEMARK:
559 linemark = t;
a0d0e21e
LW		 560 lines++;
561 gotsome = FALSE;
562 break;
563
564 case FF_LITERAL:
565 arg = *fpc++;
1bd51a4c 566 if (targ_is_utf8 && !SvUTF8(tmpForm)) {
b15aece3 567 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
78da4d13
JH		 568 *t = '\0';
569 sv_catpvn_utf8_upgrade(PL_formtarget, f, arg, nsv);
570 t = SvEND(PL_formtarget);
f3f2f1a3 571 f += arg;
1bd51a4c
IH		 572 break;
573 }
574 if (!targ_is_utf8 && DO_UTF8(tmpForm)) {
b15aece3 575 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
1bd51a4c 576 *t = '\0';
7bf79863 577 sv_utf8_upgrade_flags_grow(PL_formtarget, SV_GMAGIC, fudge + 1);
1bd51a4c
IH		 578 t = SvEND(PL_formtarget);
579 targ_is_utf8 = TRUE;
580 }
a0d0e21e
LW		 581 while (arg--)
582 *t++ = *f++;
583 break;
584
585 case FF_SKIP:
586 f += *fpc++;
587 break;
588
589 case FF_FETCH:
590 arg = *fpc++;
591 f += arg;
592 fieldsize = arg;
593
594 if (MARK < SP)
595 sv = *++MARK;
596 else {
3280af22 597 sv = &PL_sv_no;
a2a5de95 598 Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), "Not enough format arguments");
a0d0e21e
LW		 599 }
600 break;
601
602 case FF_CHECKNL:
5a34cab7
NC		 603 {
604 const char *send;
605 const char *s = item = SvPV_const(sv, len);
606 itemsize = len;
607 if (DO_UTF8(sv)) {
608 itemsize = sv_len_utf8(sv);
609 if (itemsize != (I32)len) {
610 I32 itembytes;
611 if (itemsize > fieldsize) {
612 itemsize = fieldsize;
613 itembytes = itemsize;
614 sv_pos_u2b(sv, &itembytes, 0);
615 }
616 else
617 itembytes = len;
618 send = chophere = s + itembytes;
619 while (s < send) {
620 if (*s & ~31)
621 gotsome = TRUE;
622 else if (*s == '\n')
623 break;
624 s++;
625 }
626 item_is_utf8 = TRUE;
627 itemsize = s - item;
628 sv_pos_b2u(sv, &itemsize);
629 break;
a0ed51b3 630 }
a0ed51b3 631 }
5a34cab7
NC		 632 item_is_utf8 = FALSE;
633 if (itemsize > fieldsize)
634 itemsize = fieldsize;
635 send = chophere = s + itemsize;
636 while (s < send) {
637 if (*s & ~31)
638 gotsome = TRUE;
639 else if (*s == '\n')
640 break;
641 s++;
642 }
643 itemsize = s - item;
644 break;
a0ed51b3 645 }
a0d0e21e
LW		 646
647 case FF_CHECKCHOP:
5a34cab7
NC		 648 {
649 const char *s = item = SvPV_const(sv, len);
650 itemsize = len;
651 if (DO_UTF8(sv)) {
652 itemsize = sv_len_utf8(sv);
653 if (itemsize != (I32)len) {
654 I32 itembytes;
655 if (itemsize <= fieldsize) {
656 const char *send = chophere = s + itemsize;
657 while (s < send) {
658 if (*s == '\r') {
659 itemsize = s - item;
a0ed51b3 660 chophere = s;
a0ed51b3 661 break;
5a34cab7
NC		 662 }
663 if (*s++ & ~31)
a0ed51b3 664 gotsome = TRUE;
a0ed51b3 665 }
a0ed51b3 666 }
5a34cab7
NC		 667 else {
668 const char *send;
669 itemsize = fieldsize;
670 itembytes = itemsize;
671 sv_pos_u2b(sv, &itembytes, 0);
672 send = chophere = s + itembytes;
673 while (s < send || (s == send && isSPACE(*s))) {
674 if (isSPACE(*s)) {
675 if (chopspace)
676 chophere = s;
677 if (*s == '\r')
678 break;
679 }
680 else {
681 if (*s & ~31)
682 gotsome = TRUE;
683 if (strchr(PL_chopset, *s))
684 chophere = s + 1;
685 }
686 s++;
687 }
688 itemsize = chophere - item;
689 sv_pos_b2u(sv, &itemsize);
690 }
691 item_is_utf8 = TRUE;
a0d0e21e
LW		 692 break;
693 }
a0d0e21e 694 }
5a34cab7
NC		 695 item_is_utf8 = FALSE;
696 if (itemsize <= fieldsize) {
697 const char *const send = chophere = s + itemsize;
698 while (s < send) {
699 if (*s == '\r') {
700 itemsize = s - item;
a0d0e21e 701 chophere = s;
a0d0e21e 702 break;
5a34cab7
NC		 703 }
704 if (*s++ & ~31)
a0d0e21e 705 gotsome = TRUE;
a0d0e21e 706 }
a0d0e21e 707 }
5a34cab7
NC		 708 else {
709 const char *send;
710 itemsize = fieldsize;
711 send = chophere = s + itemsize;
712 while (s < send || (s == send && isSPACE(*s))) {
713 if (isSPACE(*s)) {
714 if (chopspace)
715 chophere = s;
716 if (*s == '\r')
717 break;
718 }
719 else {
720 if (*s & ~31)
721 gotsome = TRUE;
722 if (strchr(PL_chopset, *s))
723 chophere = s + 1;
724 }
725 s++;
726 }
727 itemsize = chophere - item;
728 }
729 break;
a0d0e21e 730 }
a0d0e21e
LW		 731
732 case FF_SPACE:
733 arg = fieldsize - itemsize;
734 if (arg) {
735 fieldsize -= arg;
736 while (arg-- > 0)
737 *t++ = ' ';
738 }
739 break;
740
741 case FF_HALFSPACE:
742 arg = fieldsize - itemsize;
743 if (arg) {
744 arg /= 2;
745 fieldsize -= arg;
746 while (arg-- > 0)
747 *t++ = ' ';
748 }
749 break;
750
751 case FF_ITEM:
5a34cab7
NC		 752 {
753 const char *s = item;
754 arg = itemsize;
755 if (item_is_utf8) {
756 if (!targ_is_utf8) {
757 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
758 *t = '\0';
7bf79863
KW		 759 sv_utf8_upgrade_flags_grow(PL_formtarget, SV_GMAGIC,
760 fudge + 1);
5a34cab7
NC		 761 t = SvEND(PL_formtarget);
762 targ_is_utf8 = TRUE;
a0ed51b3 763 }
5a34cab7
NC		 764 while (arg--) {
765 if (UTF8_IS_CONTINUED(*s)) {
766 STRLEN skip = UTF8SKIP(s);
767 switch (skip) {
768 default:
769 Move(s,t,skip,char);
770 s += skip;
771 t += skip;
772 break;
773 case 7: *t++ = *s++;
774 case 6: *t++ = *s++;
775 case 5: *t++ = *s++;
776 case 4: *t++ = *s++;
777 case 3: *t++ = *s++;
778 case 2: *t++ = *s++;
779 case 1: *t++ = *s++;
780 }
781 }
782 else {
783 if ( !((*t++ = *s++) & ~31) )
784 t[-1] = ' ';
785 }
a0ed51b3 786 }
5a34cab7 787 break;
a0ed51b3 788 }
5a34cab7
NC		 789 if (targ_is_utf8 && !item_is_utf8) {
790 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
791 *t = '\0';
792 sv_catpvn_utf8_upgrade(PL_formtarget, s, arg, nsv);
793 for (; t < SvEND(PL_formtarget); t++) {
78da4d13 794#ifdef EBCDIC
901017d6 795 const int ch = *t;
5a34cab7 796 if (iscntrl(ch))
78da4d13 797#else
5a34cab7 798 if (!(*t & ~31))
78da4d13 799#endif
5a34cab7
NC		 800 *t = ' ';
801 }
802 break;
78da4d13 803 }
5a34cab7 804 while (arg--) {
9d116dd7 805#ifdef EBCDIC
901017d6 806 const int ch = *t++ = *s++;
5a34cab7 807 if (iscntrl(ch))
a0d0e21e 808#else
5a34cab7 809 if ( !((*t++ = *s++) & ~31) )
a0d0e21e 810#endif
5a34cab7
NC		 811 t[-1] = ' ';
812 }
813 break;
a0d0e21e 814 }
a0d0e21e
LW		 815
816 case FF_CHOP:
5a34cab7
NC		 817 {
818 const char *s = chophere;
819 if (chopspace) {
af68e756 820 while (isSPACE(*s))
5a34cab7
NC		 821 s++;
822 }
823 sv_chop(sv,s);
824 SvSETMAGIC(sv);
825 break;
a0d0e21e 826 }
a0d0e21e 827
a1b95068
WL		 828 case FF_LINESNGL:
829 chopspace = 0;
a0d0e21e 830 case FF_LINEGLOB:
5a34cab7 831 {
e32383e2 832 const bool oneline = fpc[-1] == FF_LINESNGL;
5a34cab7 833 const char *s = item = SvPV_const(sv, len);
f3f2f1a3 834 item_is_utf8 = DO_UTF8(sv);
5a34cab7 835 itemsize = len;
5a34cab7 836 if (itemsize) {
e8e72d41 837 STRLEN to_copy = itemsize;
5a34cab7 838 const char *const send = s + len;
35c6393c 839 const U8 *source = (const U8 *) s;
e8e72d41
NC		 840 U8 *tmp = NULL;
841
5a34cab7
NC		 842 gotsome = TRUE;
843 chophere = s + itemsize;
844 while (s < send) {
845 if (*s++ == '\n') {
846 if (oneline) {
e8e72d41 847 to_copy = s - SvPVX_const(sv) - 1;
5a34cab7
NC		 848 chophere = s;
849 break;
850 } else {
851 if (s == send) {
852 itemsize--;
e8e72d41 853 to_copy--;
5a34cab7
NC		 854 } else
855 lines++;
856 }
1bd51a4c 857 }
a0d0e21e 858 }
e8e72d41 859 if (targ_is_utf8 && !item_is_utf8) {
35c6393c 860 source = tmp = bytes_to_utf8(source, &to_copy);
e8e72d41
NC		 861 SvCUR_set(PL_formtarget,
862 t - SvPVX_const(PL_formtarget));
863 } else {
864 if (item_is_utf8 && !targ_is_utf8) {
865 /* Upgrade targ to UTF8, and then we reduce it to
866 a problem we have a simple solution for. */
867 SvCUR_set(PL_formtarget,
868 t - SvPVX_const(PL_formtarget));
869 targ_is_utf8 = TRUE;
870 /* Don't need get magic. */
7bf79863 871 sv_utf8_upgrade_nomg(PL_formtarget);
e8e72d41
NC		 872 } else {
873 SvCUR_set(PL_formtarget,
874 t - SvPVX_const(PL_formtarget));
875 }
e8e72d41
NC		 876
877 /* Easy. They agree. */
878 assert (item_is_utf8 == targ_is_utf8);
879 }
880 SvGROW(PL_formtarget,
881 SvCUR(PL_formtarget) + to_copy + fudge + 1);
5a34cab7 882 t = SvPVX(PL_formtarget) + SvCUR(PL_formtarget);
e8e72d41
NC		 883
884 Copy(source, t, to_copy, char);
885 t += to_copy;
886 SvCUR_set(PL_formtarget, SvCUR(PL_formtarget) + to_copy);
f3f2f1a3 887 if (item_is_utf8) {
e8e72d41
NC		 888 if (SvGMAGICAL(sv)) {
889 /* Mustn't call sv_pos_b2u() as it does a second
890 mg_get(). Is this a bug? Do we need a _flags()
891 variant? */
892 itemsize = utf8_length(source, source + itemsize);
893 } else {
894 sv_pos_b2u(sv, &itemsize);
895 }
896 assert(!tmp);
897 } else if (tmp) {
898 Safefree(tmp);
f3f2f1a3 899 }
a0d0e21e 900 }
5a34cab7 901 break;
a0d0e21e 902 }
a0d0e21e 903
a1b95068
WL		 904 case FF_0DECIMAL:
905 arg = *fpc++;
906#if defined(USE_LONG_DOUBLE)
10edeb5d
JH		 907 fmt = (const char *)
908 ((arg & 256) ?
909 "%#0*.*" PERL_PRIfldbl : "%0*.*" PERL_PRIfldbl);
a1b95068 910#else
10edeb5d
JH		 911 fmt = (const char *)
912 ((arg & 256) ?
913 "%#0*.*f" : "%0*.*f");
a1b95068
WL		 914#endif
915 goto ff_dec;
a0d0e21e 916 case FF_DECIMAL:
a0d0e21e 917 arg = *fpc++;
65202027 918#if defined(USE_LONG_DOUBLE)
10edeb5d
JH		 919 fmt = (const char *)
920 ((arg & 256) ? "%#*.*" PERL_PRIfldbl : "%*.*" PERL_PRIfldbl);
65202027 921#else
10edeb5d
JH		 922 fmt = (const char *)
923 ((arg & 256) ? "%#*.*f" : "%*.*f");
65202027 924#endif
a1b95068 925 ff_dec:
784707d5
JP		 926 /* If the field is marked with ^ and the value is undefined,
927 blank it out. */
784707d5
JP		 928 if ((arg & 512) && !SvOK(sv)) {
929 arg = fieldsize;
930 while (arg--)
931 *t++ = ' ';
932 break;
933 }
934 gotsome = TRUE;
935 value = SvNV(sv);
a1b95068 936 /* overflow evidence */
bfed75c6 937 if (num_overflow(value, fieldsize, arg)) {
a1b95068
WL		 938 arg = fieldsize;
939 while (arg--)
940 *t++ = '#';
941 break;
942 }
784707d5
JP		 943 /* Formats aren't yet marked for locales, so assume "yes". */
944 {
945 STORE_NUMERIC_STANDARD_SET_LOCAL();
d9fad198 946 my_snprintf(t, SvLEN(PL_formtarget) - (t - SvPVX(PL_formtarget)), fmt, (int) fieldsize, (int) arg & 255, value);
784707d5
JP		 947 RESTORE_NUMERIC_STANDARD();
948 }
949 t += fieldsize;
950 break;
a1b95068 951
a0d0e21e
LW		 952 case FF_NEWLINE:
953 f++;
954 while (t-- > linemark && *t == ' ') ;
955 t++;
956 *t++ = '\n';
957 break;
958
959 case FF_BLANK:
960 arg = *fpc++;
961 if (gotsome) {
962 if (arg) { /* repeat until fields exhausted? */
963 *t = '\0';
b15aece3 964 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
3280af22 965 lines += FmLINES(PL_formtarget);
1bd51a4c
IH		 966 if (targ_is_utf8)
967 SvUTF8_on(PL_formtarget);
3280af22 968 FmLINES(PL_formtarget) = lines;
a0d0e21e
LW		 969 SP = ORIGMARK;
970 RETURNOP(cLISTOP->op_first);
971 }
972 }
973 else {
974 t = linemark;
975 lines--;
976 }
977 break;
978
979 case FF_MORE:
5a34cab7
NC		 980 {
981 const char *s = chophere;
982 const char *send = item + len;
983 if (chopspace) {
af68e756 984 while (isSPACE(*s) && (s < send))
5a34cab7 985 s++;
a0d0e21e 986 }
5a34cab7
NC		 987 if (s < send) {
988 char *s1;
989 arg = fieldsize - itemsize;
990 if (arg) {
991 fieldsize -= arg;
992 while (arg-- > 0)
993 *t++ = ' ';
994 }
995 s1 = t - 3;
996 if (strnEQ(s1," ",3)) {
997 while (s1 > SvPVX_const(PL_formtarget) && isSPACE(s1[-1]))
998 s1--;
999 }
1000 *s1++ = '.';
1001 *s1++ = '.';
1002 *s1++ = '.';
a0d0e21e 1003 }
5a34cab7 1004 break;
a0d0e21e 1005 }
a0d0e21e
LW		 1006 case FF_END:
1007 *t = '\0';
b15aece3 1008 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
1bd51a4c
IH		 1009 if (targ_is_utf8)
1010 SvUTF8_on(PL_formtarget);
3280af22 1011 FmLINES(PL_formtarget) += lines;
a0d0e21e
LW		 1012 SP = ORIGMARK;
1013 RETPUSHYES;
1014 }
1015 }
1016}
1017
1018PP(pp_grepstart)
1019{
27da23d5 1020 dVAR; dSP;
a0d0e21e
LW		 1021 SV *src;
1022
3280af22 1023 if (PL_stack_base + *PL_markstack_ptr == SP) {
a0d0e21e 1024 (void)POPMARK;
54310121 1025 if (GIMME_V == G_SCALAR)
6e449a3a 1026 mXPUSHi(0);
533c011a 1027 RETURNOP(PL_op->op_next->op_next);
a0d0e21e 1028 }
3280af22 1029 PL_stack_sp = PL_stack_base + *PL_markstack_ptr + 1;
cea2e8a9
GS		 1030 pp_pushmark(); /* push dst */
1031 pp_pushmark(); /* push src */
d343c3ef 1032 ENTER_with_name("grep"); /* enter outer scope */
a0d0e21e
LW		 1033
1034 SAVETMPS;
59f00321
RGS		 1035 if (PL_op->op_private & OPpGREP_LEX)
1036 SAVESPTR(PAD_SVl(PL_op->op_targ));
1037 else
1038 SAVE_DEFSV;
d343c3ef 1039 ENTER_with_name("grep_item"); /* enter inner scope */
7766f137 1040 SAVEVPTR(PL_curpm);
a0d0e21e 1041
3280af22 1042 src = PL_stack_base[*PL_markstack_ptr];
a0d0e21e 1043 SvTEMP_off(src);
59f00321
RGS		 1044 if (PL_op->op_private & OPpGREP_LEX)
1045 PAD_SVl(PL_op->op_targ) = src;
1046 else
414bf5ae 1047 DEFSV_set(src);
a0d0e21e
LW		 1048
1049 PUTBACK;
533c011a 1050 if (PL_op->op_type == OP_MAPSTART)
cea2e8a9 1051 pp_pushmark(); /* push top */
533c011a 1052 return ((LOGOP*)PL_op->op_next)->op_other;
a0d0e21e
LW		 1053}
1054
a0d0e21e
LW		 1055PP(pp_mapwhile)
1056{
27da23d5 1057 dVAR; dSP;
f54cb97a 1058 const I32 gimme = GIMME_V;
544f3153 1059 I32 items = (SP - PL_stack_base) - *PL_markstack_ptr; /* how many new items */
a0d0e21e
LW		 1060 I32 count;
1061 I32 shift;
1062 SV** src;
ac27b0f5 1063 SV** dst;
a0d0e21e 1064
544f3153 1065 /* first, move source pointer to the next item in the source list */
3280af22 1066 ++PL_markstack_ptr[-1];
544f3153
GS		 1067
1068 /* if there are new items, push them into the destination list */
4c90a460 1069 if (items && gimme != G_VOID) {
544f3153
GS		 1070 /* might need to make room back there first */
1071 if (items > PL_markstack_ptr[-1] - PL_markstack_ptr[-2]) {
1072 /* XXX this implementation is very pessimal because the stack
1073 * is repeatedly extended for every set of items. Is possible
1074 * to do this without any stack extension or copying at all
1075 * by maintaining a separate list over which the map iterates
18ef8bea 1076 * (like foreach does). --gsar */
544f3153
GS		 1077
1078 /* everything in the stack after the destination list moves
1079 * towards the end the stack by the amount of room needed */
1080 shift = items - (PL_markstack_ptr[-1] - PL_markstack_ptr[-2]);
1081
1082 /* items to shift up (accounting for the moved source pointer) */
1083 count = (SP - PL_stack_base) - (PL_markstack_ptr[-1] - 1);
18ef8bea
BT		 1084
1085 /* This optimization is by Ben Tilly and it does
1086 * things differently from what Sarathy (gsar)
1087 * is describing. The downside of this optimization is
1088 * that leaves "holes" (uninitialized and hopefully unused areas)
1089 * to the Perl stack, but on the other hand this
1090 * shouldn't be a problem. If Sarathy's idea gets
1091 * implemented, this optimization should become
1092 * irrelevant. --jhi */
1093 if (shift < count)
1094 shift = count; /* Avoid shifting too often --Ben Tilly */
bfed75c6 1095
924508f0
GS		 1096 EXTEND(SP,shift);
1097 src = SP;
1098 dst = (SP += shift);
3280af22
NIS		 1099 PL_markstack_ptr[-1] += shift;
1100 *PL_markstack_ptr += shift;
544f3153 1101 while (count--)
a0d0e21e
LW		 1102 *dst-- = *src--;
1103 }
544f3153 1104 /* copy the new items down to the destination list */
ac27b0f5 1105 dst = PL_stack_base + (PL_markstack_ptr[-2] += items) - 1;
22023b26
TP		 1106 if (gimme == G_ARRAY) {
1107 while (items-- > 0)
1108 *dst-- = SvTEMP(TOPs) ? POPs : sv_mortalcopy(POPs);
1109 }
bfed75c6 1110 else {
22023b26
TP		 1111 /* scalar context: we don't care about which values map returns
1112 * (we use undef here). And so we certainly don't want to do mortal
1113 * copies of meaningless values. */
1114 while (items-- > 0) {
b988aa42 1115 (void)POPs;
22023b26
TP		 1116 *dst-- = &PL_sv_undef;
1117 }
1118 }
a0d0e21e 1119 }
d343c3ef 1120 LEAVE_with_name("grep_item"); /* exit inner scope */
a0d0e21e
LW		 1121
1122 /* All done yet? */
3280af22 1123 if (PL_markstack_ptr[-1] > *PL_markstack_ptr) {
a0d0e21e
LW		 1124
1125 (void)POPMARK; /* pop top */
d343c3ef 1126 LEAVE_with_name("grep"); /* exit outer scope */
a0d0e21e 1127 (void)POPMARK; /* pop src */
3280af22 1128 items = --*PL_markstack_ptr - PL_markstack_ptr[-1];
a0d0e21e 1129 (void)POPMARK; /* pop dst */
3280af22 1130 SP = PL_stack_base + POPMARK; /* pop original mark */
54310121 1131 if (gimme == G_SCALAR) {
7cc47870
RGS		 1132 if (PL_op->op_private & OPpGREP_LEX) {
1133 SV* sv = sv_newmortal();
1134 sv_setiv(sv, items);
1135 PUSHs(sv);
1136 }
1137 else {
1138 dTARGET;
1139 XPUSHi(items);
1140 }
a0d0e21e 1141 }
54310121 1142 else if (gimme == G_ARRAY)
1143 SP += items;
a0d0e21e
LW		 1144 RETURN;
1145 }
1146 else {
1147 SV *src;
1148
d343c3ef 1149 ENTER_with_name("grep_item"); /* enter inner scope */
7766f137 1150 SAVEVPTR(PL_curpm);
a0d0e21e 1151
544f3153 1152 /* set $_ to the new source item */
3280af22 1153 src = PL_stack_base[PL_markstack_ptr[-1]];
a0d0e21e 1154 SvTEMP_off(src);
59f00321
RGS		 1155 if (PL_op->op_private & OPpGREP_LEX)
1156 PAD_SVl(PL_op->op_targ) = src;
1157 else
414bf5ae 1158 DEFSV_set(src);
a0d0e21e
LW		 1159
1160 RETURNOP(cLOGOP->op_other);
1161 }
1162}
1163
a0d0e21e
LW		 1164/* Range stuff. */
1165
1166PP(pp_range)
1167{
97aff369 1168 dVAR;
a0d0e21e 1169 if (GIMME == G_ARRAY)
1a67a97c 1170 return NORMAL;
538573f7 1171 if (SvTRUEx(PAD_SV(PL_op->op_targ)))
1a67a97c 1172 return cLOGOP->op_other;
538573f7 1173 else
1a67a97c 1174 return NORMAL;
a0d0e21e
LW		 1175}
1176
1177PP(pp_flip)
1178{
97aff369 1179 dVAR;
39644a26 1180 dSP;
a0d0e21e
LW		 1181
1182 if (GIMME == G_ARRAY) {
1a67a97c 1183 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW		 1184 }
1185 else {
1186 dTOPss;
44f8325f 1187 SV * const targ = PAD_SV(PL_op->op_targ);
bfed75c6 1188 int flip = 0;
790090df 1189
bfed75c6 1190 if (PL_op->op_private & OPpFLIP_LINENUM) {
4e3399f9
YST		 1191 if (GvIO(PL_last_in_gv)) {
1192 flip = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1193 }
1194 else {
fafc274c 1195 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
44f8325f
AL		 1196 if (gv && GvSV(gv))
1197 flip = SvIV(sv) == SvIV(GvSV(gv));
4e3399f9 1198 }
bfed75c6
AL		 1199 } else {
1200 flip = SvTRUE(sv);
1201 }
1202 if (flip) {
a0d0e21e 1203 sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1);
533c011a 1204 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 1205 sv_setiv(targ, 1);
3e3baf6d 1206 SETs(targ);
a0d0e21e
LW		 1207 RETURN;
1208 }
1209 else {
1210 sv_setiv(targ, 0);
924508f0 1211 SP--;
1a67a97c 1212 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW		 1213 }
1214 }
76f68e9b 1215 sv_setpvs(TARG, "");
a0d0e21e
LW		 1216 SETs(targ);
1217 RETURN;
1218 }
1219}
1220
8e9bbdb9
RGS		 1221/* This code tries to decide if "$left .. $right" should use the
1222 magical string increment, or if the range is numeric (we make
1223 an exception for .."0" [#18165]). AMS 20021031. */
1224
1225#define RANGE_IS_NUMERIC(left,right) ( \
b0e74086
RGS		 1226 SvNIOKp(left) || (SvOK(left) && !SvPOKp(left)) || \
1227 SvNIOKp(right) || (SvOK(right) && !SvPOKp(right)) || \
e0ab1c0e 1228 (((!SvOK(left) && SvOK(right)) || ((!SvOK(left) || \
b15aece3 1229 looks_like_number(left)) && SvPOKp(left) && *SvPVX_const(left) != '0')) \
e0ab1c0e 1230 && (!SvOK(right) || looks_like_number(right))))
8e9bbdb9 1231
a0d0e21e
LW		 1232PP(pp_flop)
1233{
97aff369 1234 dVAR; dSP;
a0d0e21e
LW		 1235
1236 if (GIMME == G_ARRAY) {
1237 dPOPPOPssrl;
86cb7173 1238
5b295bef
RD		 1239 SvGETMAGIC(left);
1240 SvGETMAGIC(right);
a0d0e21e 1241
8e9bbdb9 1242 if (RANGE_IS_NUMERIC(left,right)) {
901017d6
AL		 1243 register IV i, j;
1244 IV max;
4fe3f0fa
MHM		 1245 if ((SvOK(left) && SvNV(left) < IV_MIN) ||
1246 (SvOK(right) && SvNV(right) > IV_MAX))
d470f89e 1247 DIE(aTHX_ "Range iterator outside integer range");
a0d0e21e
LW		 1248 i = SvIV(left);
1249 max = SvIV(right);
bbce6d69 1250 if (max >= i) {
c1ab3db2
AK		 1251 j = max - i + 1;
1252 EXTEND_MORTAL(j);
1253 EXTEND(SP, j);
bbce6d69 1254 }
c1ab3db2
AK		 1255 else
1256 j = 0;
1257 while (j--) {
901017d6 1258 SV * const sv = sv_2mortal(newSViv(i++));
a0d0e21e
LW		 1259 PUSHs(sv);
1260 }
1261 }
1262 else {
44f8325f 1263 SV * const final = sv_mortalcopy(right);
13c5b33c 1264 STRLEN len;
823a54a3 1265 const char * const tmps = SvPV_const(final, len);
a0d0e21e 1266
901017d6 1267 SV *sv = sv_mortalcopy(left);
13c5b33c 1268 SvPV_force_nolen(sv);
89ea2908 1269 while (!SvNIOKp(sv) && SvCUR(sv) <= len) {
a0d0e21e 1270 XPUSHs(sv);
b15aece3 1271 if (strEQ(SvPVX_const(sv),tmps))
89ea2908 1272 break;
a0d0e21e
LW		 1273 sv = sv_2mortal(newSVsv(sv));
1274 sv_inc(sv);
1275 }
a0d0e21e
LW		 1276 }
1277 }
1278 else {
1279 dTOPss;
901017d6 1280 SV * const targ = PAD_SV(cUNOP->op_first->op_targ);
4e3399f9 1281 int flop = 0;
a0d0e21e 1282 sv_inc(targ);
4e3399f9
YST		 1283
1284 if (PL_op->op_private & OPpFLIP_LINENUM) {
1285 if (GvIO(PL_last_in_gv)) {
1286 flop = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1287 }
1288 else {
fafc274c 1289 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
4e3399f9
YST		 1290 if (gv && GvSV(gv)) flop = SvIV(sv) == SvIV(GvSV(gv));
1291 }
1292 }
1293 else {
1294 flop = SvTRUE(sv);
1295 }
1296
1297 if (flop) {
a0d0e21e 1298 sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0);
396482e1 1299 sv_catpvs(targ, "E0");
a0d0e21e
LW		 1300 }
1301 SETs(targ);
1302 }
1303
1304 RETURN;
1305}
1306
1307/* Control. */
1308
27da23d5 1309static const char * const context_name[] = {
515afda2 1310 "pseudo-block",
f31522f3 1311 NULL, /* CXt_WHEN never actually needs "block" */
76753e7f 1312 NULL, /* CXt_BLOCK never actually needs "block" */
f31522f3 1313 NULL, /* CXt_GIVEN never actually needs "block" */
76753e7f
NC		 1314 NULL, /* CXt_LOOP_FOR never actually needs "loop" */
1315 NULL, /* CXt_LOOP_PLAIN never actually needs "loop" */
1316 NULL, /* CXt_LOOP_LAZYSV never actually needs "loop" */
1317 NULL, /* CXt_LOOP_LAZYIV never actually needs "loop" */
515afda2 1318 "subroutine",
76753e7f 1319 "format",
515afda2 1320 "eval",
515afda2 1321 "substitution",
515afda2
NC		 1322};
1323
76e3520e 1324STATIC I32
06b5626a 1325S_dopoptolabel(pTHX_ const char *label)
a0d0e21e 1326{
97aff369 1327 dVAR;
a0d0e21e 1328 register I32 i;
a0d0e21e 1329
7918f24d
NC		 1330 PERL_ARGS_ASSERT_DOPOPTOLABEL;
1331
a0d0e21e 1332 for (i = cxstack_ix; i >= 0; i--) {
901017d6 1333 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1334 switch (CxTYPE(cx)) {
a0d0e21e 1335 case CXt_SUBST:
a0d0e21e 1336 case CXt_SUB:
7766f137 1337 case CXt_FORMAT:
a0d0e21e 1338 case CXt_EVAL:
0a753a76 1339 case CXt_NULL:
a2a5de95
NC		 1340 Perl_ck_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1341 context_name[CxTYPE(cx)], OP_NAME(PL_op));
515afda2
NC		 1342 if (CxTYPE(cx) == CXt_NULL)
1343 return -1;
1344 break;
c6fdafd0 1345 case CXt_LOOP_LAZYIV:
d01136d6 1346 case CXt_LOOP_LAZYSV:
3b719c58
NC		 1347 case CXt_LOOP_FOR:
1348 case CXt_LOOP_PLAIN:
7e8f1eac
AD		 1349 {
1350 const char *cx_label = CxLABEL(cx);
1351 if (!cx_label || strNE(label, cx_label) ) {
1c98cc53 1352 DEBUG_l(Perl_deb(aTHX_ "(poptolabel(): skipping label at cx=%ld %s)\n",
7e8f1eac 1353 (long)i, cx_label));
a0d0e21e
LW		 1354 continue;
1355 }
1c98cc53 1356 DEBUG_l( Perl_deb(aTHX_ "(poptolabel(): found label at cx=%ld %s)\n", (long)i, label));
a0d0e21e 1357 return i;
7e8f1eac 1358 }
a0d0e21e
LW		 1359 }
1360 }
1361 return i;
1362}
1363
0d863452
RH		 1364
1365
e50aee73 1366I32
864dbfa3 1367Perl_dowantarray(pTHX)
e50aee73 1368{
97aff369 1369 dVAR;
f54cb97a 1370 const I32 gimme = block_gimme();
54310121 1371 return (gimme == G_VOID) ? G_SCALAR : gimme;
1372}
1373
1374I32
864dbfa3 1375Perl_block_gimme(pTHX)
54310121 1376{
97aff369 1377 dVAR;
06b5626a 1378 const I32 cxix = dopoptosub(cxstack_ix);
e50aee73 1379 if (cxix < 0)
46fc3d4c 1380 return G_VOID;
e50aee73 1381
54310121 1382 switch (cxstack[cxix].blk_gimme) {
d2719217
GS		 1383 case G_VOID:
1384 return G_VOID;
54310121 1385 case G_SCALAR:
e50aee73 1386 return G_SCALAR;
54310121 1387 case G_ARRAY:
1388 return G_ARRAY;
1389 default:
cea2e8a9 1390 Perl_croak(aTHX_ "panic: bad gimme: %d\n", cxstack[cxix].blk_gimme);
d2719217
GS		 1391 /* NOTREACHED */
1392 return 0;
54310121 1393 }
e50aee73
AD		 1394}
1395
78f9721b
SM		 1396I32
1397Perl_is_lvalue_sub(pTHX)
1398{
97aff369 1399 dVAR;
06b5626a 1400 const I32 cxix = dopoptosub(cxstack_ix);
78f9721b
SM		 1401 assert(cxix >= 0); /* We should only be called from inside subs */
1402
bafb2adc
NC		 1403 if (CxLVAL(cxstack + cxix) && CvLVALUE(cxstack[cxix].blk_sub.cv))
1404 return CxLVAL(cxstack + cxix);
78f9721b
SM		 1405 else
1406 return 0;
1407}
1408
76e3520e 1409STATIC I32
901017d6 1410S_dopoptosub_at(pTHX_ const PERL_CONTEXT *cxstk, I32 startingblock)
2c375eb9 1411{
97aff369 1412 dVAR;
a0d0e21e 1413 I32 i;
7918f24d
NC		 1414
1415 PERL_ARGS_ASSERT_DOPOPTOSUB_AT;
1416
a0d0e21e 1417 for (i = startingblock; i >= 0; i--) {
901017d6 1418 register const PERL_CONTEXT * const cx = &cxstk[i];
6b35e009 1419 switch (CxTYPE(cx)) {
a0d0e21e
LW		 1420 default:
1421 continue;
1422 case CXt_EVAL:
1423 case CXt_SUB:
7766f137 1424 case CXt_FORMAT:
1c98cc53 1425 DEBUG_l( Perl_deb(aTHX_ "(dopoptosub_at(): found sub at cx=%ld)\n", (long)i));
a0d0e21e
LW		 1426 return i;
1427 }
1428 }
1429 return i;
1430}
1431
76e3520e 1432STATIC I32
cea2e8a9 1433S_dopoptoeval(pTHX_ I32 startingblock)
a0d0e21e 1434{
97aff369 1435 dVAR;
a0d0e21e 1436 I32 i;
a0d0e21e 1437 for (i = startingblock; i >= 0; i--) {
06b5626a 1438 register const PERL_CONTEXT *cx = &cxstack[i];
6b35e009 1439 switch (CxTYPE(cx)) {
a0d0e21e
LW		 1440 default:
1441 continue;
1442 case CXt_EVAL:
1c98cc53 1443 DEBUG_l( Perl_deb(aTHX_ "(dopoptoeval(): found eval at cx=%ld)\n", (long)i));
a0d0e21e
LW		 1444 return i;
1445 }
1446 }
1447 return i;
1448}
1449
76e3520e 1450STATIC I32
cea2e8a9 1451S_dopoptoloop(pTHX_ I32 startingblock)
a0d0e21e 1452{
97aff369 1453 dVAR;
a0d0e21e 1454 I32 i;
a0d0e21e 1455 for (i = startingblock; i >= 0; i--) {
901017d6 1456 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1457 switch (CxTYPE(cx)) {
a0d0e21e 1458 case CXt_SUBST:
a0d0e21e 1459 case CXt_SUB:
7766f137 1460 case CXt_FORMAT:
a0d0e21e 1461 case CXt_EVAL:
0a753a76 1462 case CXt_NULL:
a2a5de95
NC		 1463 Perl_ck_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1464 context_name[CxTYPE(cx)], OP_NAME(PL_op));
515afda2
NC		 1465 if ((CxTYPE(cx)) == CXt_NULL)
1466 return -1;
1467 break;
c6fdafd0 1468 case CXt_LOOP_LAZYIV:
d01136d6 1469 case CXt_LOOP_LAZYSV:
3b719c58
NC		 1470 case CXt_LOOP_FOR:
1471 case CXt_LOOP_PLAIN:
1c98cc53 1472 DEBUG_l( Perl_deb(aTHX_ "(dopoptoloop(): found loop at cx=%ld)\n", (long)i));
a0d0e21e
LW		 1473 return i;
1474 }
1475 }
1476 return i;
1477}
1478
0d863452
RH		 1479STATIC I32
1480S_dopoptogiven(pTHX_ I32 startingblock)
1481{
97aff369 1482 dVAR;
0d863452
RH		 1483 I32 i;
1484 for (i = startingblock; i >= 0; i--) {
1485 register const PERL_CONTEXT *cx = &cxstack[i];
1486 switch (CxTYPE(cx)) {
1487 default:
1488 continue;
1489 case CXt_GIVEN:
1c98cc53 1490 DEBUG_l( Perl_deb(aTHX_ "(dopoptogiven(): found given at cx=%ld)\n", (long)i));
0d863452 1491 return i;
3b719c58
NC		 1492 case CXt_LOOP_PLAIN:
1493 assert(!CxFOREACHDEF(cx));
1494 break;
c6fdafd0 1495 case CXt_LOOP_LAZYIV:
d01136d6 1496 case CXt_LOOP_LAZYSV:
3b719c58 1497 case CXt_LOOP_FOR:
0d863452 1498 if (CxFOREACHDEF(cx)) {
1c98cc53 1499 DEBUG_l( Perl_deb(aTHX_ "(dopoptogiven(): found foreach at cx=%ld)\n", (long)i));
0d863452
RH		 1500 return i;
1501 }
1502 }
1503 }
1504 return i;
1505}
1506
1507STATIC I32
1508S_dopoptowhen(pTHX_ I32 startingblock)
1509{
97aff369 1510 dVAR;
0d863452
RH		 1511 I32 i;
1512 for (i = startingblock; i >= 0; i--) {
1513 register const PERL_CONTEXT *cx = &cxstack[i];
1514 switch (CxTYPE(cx)) {
1515 default:
1516 continue;
1517 case CXt_WHEN:
1c98cc53 1518 DEBUG_l( Perl_deb(aTHX_ "(dopoptowhen(): found when at cx=%ld)\n", (long)i));
0d863452
RH		 1519 return i;
1520 }
1521 }
1522 return i;
1523}
1524
a0d0e21e 1525void
864dbfa3 1526Perl_dounwind(pTHX_ I32 cxix)
a0d0e21e 1527{
97aff369 1528 dVAR;
a0d0e21e
LW		 1529 I32 optype;
1530
1531 while (cxstack_ix > cxix) {
b0d9ce38 1532 SV *sv;
06b5626a 1533 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1c98cc53 1534 DEBUG_CX("UNWIND"); \
a0d0e21e 1535 /* Note: we don't need to restore the base context info till the end. */
6b35e009 1536 switch (CxTYPE(cx)) {
c90c0ff4 1537 case CXt_SUBST:
1538 POPSUBST(cx);
1539 continue; /* not break */
a0d0e21e 1540 case CXt_SUB:
b0d9ce38
GS		 1541 POPSUB(cx,sv);
1542 LEAVESUB(sv);
a0d0e21e
LW		 1543 break;
1544 case CXt_EVAL:
1545 POPEVAL(cx);
1546 break;
c6fdafd0 1547 case CXt_LOOP_LAZYIV:
d01136d6 1548 case CXt_LOOP_LAZYSV:
3b719c58
NC		 1549 case CXt_LOOP_FOR:
1550 case CXt_LOOP_PLAIN:
a0d0e21e
LW		 1551 POPLOOP(cx);
1552 break;
0a753a76 1553 case CXt_NULL:
a0d0e21e 1554 break;
7766f137
GS		 1555 case CXt_FORMAT:
1556 POPFORMAT(cx);
1557 break;
a0d0e21e 1558 }
c90c0ff4 1559 cxstack_ix--;
a0d0e21e 1560 }
1b6737cc 1561 PERL_UNUSED_VAR(optype);
a0d0e21e
LW		 1562}
1563
5a844595
GS		 1564void
1565Perl_qerror(pTHX_ SV *err)
1566{
97aff369 1567 dVAR;
7918f24d
NC		 1568
1569 PERL_ARGS_ASSERT_QERROR;
1570
5a844595
GS		 1571 if (PL_in_eval)
1572 sv_catsv(ERRSV, err);
1573 else if (PL_errors)
1574 sv_catsv(PL_errors, err);
1575 else
be2597df 1576 Perl_warn(aTHX_ "%"SVf, SVfARG(err));
13765c85
DM		 1577 if (PL_parser)
1578 ++PL_parser->error_count;
5a844595
GS		 1579}
1580
bb4c52e0 1581void
c5df3096 1582Perl_die_unwind(pTHX_ SV *msv)
a0d0e21e 1583{
27da23d5 1584 dVAR;
c5df3096 1585 SV *exceptsv = sv_mortalcopy(msv);
96d9b9cd 1586 U8 in_eval = PL_in_eval;
c5df3096 1587 PERL_ARGS_ASSERT_DIE_UNWIND;
87582a92 1588
96d9b9cd 1589 if (in_eval) {
a0d0e21e 1590 I32 cxix;
a0d0e21e 1591 I32 gimme;
a0d0e21e 1592
5a844595
GS		 1593 while ((cxix = dopoptoeval(cxstack_ix)) < 0
1594 && PL_curstackinfo->si_prev)
1595 {
bac4b2ad 1596 dounwind(-1);
d3acc0f7 1597 POPSTACK;
bac4b2ad 1598 }
e336de0d 1599
a0d0e21e
LW		 1600 if (cxix >= 0) {
1601 I32 optype;
b6494f15 1602 SV *namesv;
35a4481c 1603 register PERL_CONTEXT *cx;
901017d6 1604 SV **newsp;
a0d0e21e
LW		 1605
1606 if (cxix < cxstack_ix)
1607 dounwind(cxix);
1608
3280af22 1609 POPBLOCK(cx,PL_curpm);
6b35e009 1610 if (CxTYPE(cx) != CXt_EVAL) {
7d0994e0 1611 STRLEN msglen;
96d9b9cd 1612 const char* message = SvPVx_const(exceptsv, msglen);
10edeb5d 1613 PerlIO_write(Perl_error_log, (const char *)"panic: die ", 11);
bf49b057 1614 PerlIO_write(Perl_error_log, message, msglen);
a0d0e21e
LW		 1615 my_exit(1);
1616 }
1617 POPEVAL(cx);
b6494f15 1618 namesv = cx->blk_eval.old_namesv;
a0d0e21e
LW		 1619
1620 if (gimme == G_SCALAR)
3280af22
NIS		 1621 *++newsp = &PL_sv_undef;
1622 PL_stack_sp = newsp;
a0d0e21e
LW		 1623
1624 LEAVE;
748a9306 1625
7fb6a879
GS		 1626 /* LEAVE could clobber PL_curcop (see save_re_context())
1627 * XXX it might be better to find a way to avoid messing with
1628 * PL_curcop in save_re_context() instead, but this is a more
1629 * minimal fix --GSAR */
1630 PL_curcop = cx->blk_oldcop;
1631
7a2e2cd6 1632 if (optype == OP_REQUIRE) {
96d9b9cd 1633 const char* const msg = SvPVx_nolen_const(exceptsv);
b6494f15
VP		 1634 (void)hv_store(GvHVn(PL_incgv),
1635 SvPVX_const(namesv), SvCUR(namesv),
27bcc0a7 1636 &PL_sv_undef, 0);
27e90453
DM		 1637 /* note that unlike pp_entereval, pp_require isn't
1638 * supposed to trap errors. So now that we've popped the
1639 * EVAL that pp_require pushed, and processed the error
1640 * message, rethrow the error */
9fed9930
NC		 1641 Perl_croak(aTHX_ "%sCompilation failed in require",
1642 *msg ? msg : "Unknown error\n");
7a2e2cd6 1643 }
c5df3096 1644 if (in_eval & EVAL_KEEPERR) {
7ce09284
Z		 1645 Perl_ck_warner(aTHX_ packWARN(WARN_MISC), "\t(in cleanup) %s",
1646 SvPV_nolen_const(exceptsv));
96d9b9cd
Z		 1647 }
1648 else {
1649 sv_setsv(ERRSV, exceptsv);
1650 }
f39bc417 1651 assert(CxTYPE(cx) == CXt_EVAL);
febb3a6d 1652 PL_restartjmpenv = cx->blk_eval.cur_top_env;
bb4c52e0
GG		 1653 PL_restartop = cx->blk_eval.retop;
1654 JMPENV_JUMP(3);
1655 /* NOTREACHED */
a0d0e21e
LW		 1656 }
1657 }
87582a92 1658
96d9b9cd 1659 write_to_stderr(exceptsv);
f86702cc 1660 my_failure_exit();
1661 /* NOTREACHED */
a0d0e21e
LW		 1662}
1663
1664PP(pp_xor)
1665{
97aff369 1666 dVAR; dSP; dPOPTOPssrl;
a0d0e21e
LW		 1667 if (SvTRUE(left) != SvTRUE(right))
1668 RETSETYES;
1669 else
1670 RETSETNO;
1671}
1672
a0d0e21e
LW		 1673PP(pp_caller)
1674{
97aff369 1675 dVAR;
39644a26 1676 dSP;
a0d0e21e 1677 register I32 cxix = dopoptosub(cxstack_ix);
901017d6
AL		 1678 register const PERL_CONTEXT *cx;
1679 register const PERL_CONTEXT *ccstack = cxstack;
1680 const PERL_SI *top_si = PL_curstackinfo;
54310121 1681 I32 gimme;
06b5626a 1682 const char *stashname;
a0d0e21e
LW		 1683 I32 count = 0;
1684
1685 if (MAXARG)
1686 count = POPi;
27d41816 1687
a0d0e21e 1688 for (;;) {
2c375eb9
GS		 1689 /* we may be in a higher stacklevel, so dig down deeper */
1690 while (cxix < 0 && top_si->si_type != PERLSI_MAIN) {
1691 top_si = top_si->si_prev;
1692 ccstack = top_si->si_cxstack;
1693 cxix = dopoptosub_at(ccstack, top_si->si_cxix);
1694 }
a0d0e21e 1695 if (cxix < 0) {
27d41816
DM		 1696 if (GIMME != G_ARRAY) {
1697 EXTEND(SP, 1);
a0d0e21e 1698 RETPUSHUNDEF;
27d41816 1699 }
a0d0e21e
LW		 1700 RETURN;
1701 }
f2a7f298
DG		 1702 /* caller() should not report the automatic calls to &DB::sub */
1703 if (PL_DBsub && GvCV(PL_DBsub) && cxix >= 0 &&
3280af22 1704 ccstack[cxix].blk_sub.cv == GvCV(PL_DBsub))
a0d0e21e
LW		 1705 count++;
1706 if (!count--)
1707 break;
2c375eb9 1708 cxix = dopoptosub_at(ccstack, cxix - 1);
a0d0e21e 1709 }
2c375eb9
GS		 1710
1711 cx = &ccstack[cxix];
7766f137 1712 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
f54cb97a 1713 const I32 dbcxix = dopoptosub_at(ccstack, cxix - 1);
2c375eb9 1714 /* We expect that ccstack[dbcxix] is CXt_SUB, anyway, the
06a5b730 1715 field below is defined for any cx. */
f2a7f298
DG		 1716 /* caller() should not report the automatic calls to &DB::sub */
1717 if (PL_DBsub && GvCV(PL_DBsub) && dbcxix >= 0 && ccstack[dbcxix].blk_sub.cv == GvCV(PL_DBsub))
2c375eb9 1718 cx = &ccstack[dbcxix];
06a5b730 1719 }
1720
ed094faf 1721 stashname = CopSTASHPV(cx->blk_oldcop);
a0d0e21e 1722 if (GIMME != G_ARRAY) {
27d41816 1723 EXTEND(SP, 1);
ed094faf 1724 if (!stashname)
3280af22 1725 PUSHs(&PL_sv_undef);
49d8d3a1
MB		 1726 else {
1727 dTARGET;
ed094faf 1728 sv_setpv(TARG, stashname);
49d8d3a1
MB		 1729 PUSHs(TARG);
1730 }
a0d0e21e
LW		 1731 RETURN;
1732 }
a0d0e21e 1733
b3ca2e83 1734 EXTEND(SP, 11);
27d41816 1735
ed094faf 1736 if (!stashname)
3280af22 1737 PUSHs(&PL_sv_undef);
49d8d3a1 1738 else
6e449a3a
MHM		 1739 mPUSHs(newSVpv(stashname, 0));
1740 mPUSHs(newSVpv(OutCopFILE(cx->blk_oldcop), 0));
1741 mPUSHi((I32)CopLINE(cx->blk_oldcop));
a0d0e21e
LW		 1742 if (!MAXARG)
1743 RETURN;
7766f137 1744 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
0bd48802 1745 GV * const cvgv = CvGV(ccstack[cxix].blk_sub.cv);
7766f137 1746 /* So is ccstack[dbcxix]. */
07b8c804 1747 if (isGV(cvgv)) {
561b68a9 1748 SV * const sv = newSV(0);
c445ea15 1749 gv_efullname3(sv, cvgv, NULL);
6e449a3a 1750 mPUSHs(sv);
bf38a478 1751 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804
RGS		 1752 }
1753 else {
84bafc02 1754 PUSHs(newSVpvs_flags("(unknown)", SVs_TEMP));
bf38a478 1755 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804 1756 }
a0d0e21e
LW		 1757 }
1758 else {
84bafc02 1759 PUSHs(newSVpvs_flags("(eval)", SVs_TEMP));
6e449a3a 1760 mPUSHi(0);
a0d0e21e 1761 }
54310121 1762 gimme = (I32)cx->blk_gimme;
1763 if (gimme == G_VOID)
3280af22 1764 PUSHs(&PL_sv_undef);
54310121 1765 else
98625aca 1766 PUSHs(boolSV((gimme & G_WANT) == G_ARRAY));
6b35e009 1767 if (CxTYPE(cx) == CXt_EVAL) {
811a4de9 1768 /* eval STRING */
85a64632 1769 if (CxOLD_OP_TYPE(cx) == OP_ENTEREVAL) {
4633a7c4 1770 PUSHs(cx->blk_eval.cur_text);
3280af22 1771 PUSHs(&PL_sv_no);
0f79a09d 1772 }
811a4de9 1773 /* require */
0f79a09d 1774 else if (cx->blk_eval.old_namesv) {
6e449a3a 1775 mPUSHs(newSVsv(cx->blk_eval.old_namesv));
3280af22 1776 PUSHs(&PL_sv_yes);
06a5b730 1777 }
811a4de9
GS		 1778 /* eval BLOCK (try blocks have old_namesv == 0) */
1779 else {
1780 PUSHs(&PL_sv_undef);
1781 PUSHs(&PL_sv_undef);
1782 }
4633a7c4 1783 }
a682de96
GS		 1784 else {
1785 PUSHs(&PL_sv_undef);
1786 PUSHs(&PL_sv_undef);
1787 }
bafb2adc 1788 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)
ed094faf 1789 && CopSTASH_eq(PL_curcop, PL_debstash))
4633a7c4 1790 {
66a1b24b
AL		 1791 AV * const ary = cx->blk_sub.argarray;
1792 const int off = AvARRAY(ary) - AvALLOC(ary);
a0d0e21e 1793
5b235299
NC		 1794 if (!PL_dbargs)
1795 Perl_init_dbargs(aTHX);
a0d0e21e 1796
3280af22
NIS		 1797 if (AvMAX(PL_dbargs) < AvFILLp(ary) + off)
1798 av_extend(PL_dbargs, AvFILLp(ary) + off);
1799 Copy(AvALLOC(ary), AvARRAY(PL_dbargs), AvFILLp(ary) + 1 + off, SV*);
1800 AvFILLp(PL_dbargs) = AvFILLp(ary) + off;
a0d0e21e 1801 }
f3aa04c2
GS		 1802 /* XXX only hints propagated via op_private are currently
1803 * visible (others are not easily accessible, since they
1804 * use the global PL_hints) */
6e449a3a 1805 mPUSHi(CopHINTS_get(cx->blk_oldcop));
e476b1b5
GS		 1806 {
1807 SV * mask ;
72dc9ed5 1808 STRLEN * const old_warnings = cx->blk_oldcop->cop_warnings ;
114bafba 1809
ac27b0f5 1810 if (old_warnings == pWARN_NONE ||
114bafba 1811 (old_warnings == pWARN_STD && (PL_dowarn & G_WARN_ON) == 0))
e476b1b5 1812 mask = newSVpvn(WARN_NONEstring, WARNsize) ;
ac27b0f5 1813 else if (old_warnings == pWARN_ALL ||
75b6c4ca
RGS		 1814 (old_warnings == pWARN_STD && PL_dowarn & G_WARN_ON)) {
1815 /* Get the bit mask for $warnings::Bits{all}, because
1816 * it could have been extended by warnings::register */
1817 SV **bits_all;
6673a63c 1818 HV * const bits = get_hv("warnings::Bits", 0);
017a3ce5 1819 if (bits && (bits_all=hv_fetchs(bits, "all", FALSE))) {
75b6c4ca
RGS		 1820 mask = newSVsv(*bits_all);
1821 }
1822 else {
1823 mask = newSVpvn(WARN_ALLstring, WARNsize) ;
1824 }
1825 }
e476b1b5 1826 else
72dc9ed5 1827 mask = newSVpvn((char *) (old_warnings + 1), old_warnings[0]);
6e449a3a 1828 mPUSHs(mask);
e476b1b5 1829 }
b3ca2e83 1830
c28fe1ec 1831 PUSHs(cx->blk_oldcop->cop_hints_hash ?
b3ca2e83 1832 sv_2mortal(newRV_noinc(
ad64d0ec
NC		 1833 MUTABLE_SV(Perl_refcounted_he_chain_2hv(aTHX_
1834 cx->blk_oldcop->cop_hints_hash))))
b3ca2e83 1835 : &PL_sv_undef);
a0d0e21e
LW		 1836 RETURN;
1837}
1838
a0d0e21e
LW		 1839PP(pp_reset)
1840{
97aff369 1841 dVAR;
39644a26 1842 dSP;
10edeb5d 1843 const char * const tmps = (MAXARG < 1) ? (const char *)"" : POPpconstx;
11faa288 1844 sv_reset(tmps, CopSTASH(PL_curcop));
3280af22 1845 PUSHs(&PL_sv_yes);
a0d0e21e
LW		 1846 RETURN;
1847}
1848
dd2155a4
DM		 1849/* like pp_nextstate, but used instead when the debugger is active */
1850
a0d0e21e
LW		 1851PP(pp_dbstate)
1852{
27da23d5 1853 dVAR;
533c011a 1854 PL_curcop = (COP*)PL_op;
a0d0e21e 1855 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 1856 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW		 1857 FREETMPS;
1858
f410a211
NC		 1859 PERL_ASYNC_CHECK();
1860
5df8de69
DM		 1861 if (PL_op->op_flags & OPf_SPECIAL /* breakpoint */
1862 || SvIV(PL_DBsingle) || SvIV(PL_DBsignal) || SvIV(PL_DBtrace))
a0d0e21e 1863 {
39644a26 1864 dSP;
c09156bb 1865 register PERL_CONTEXT *cx;
f54cb97a 1866 const I32 gimme = G_ARRAY;
eb160463 1867 U8 hasargs;
0bd48802
AL		 1868 GV * const gv = PL_DBgv;
1869 register CV * const cv = GvCV(gv);
a0d0e21e 1870
a0d0e21e 1871 if (!cv)
cea2e8a9 1872 DIE(aTHX_ "No DB::DB routine defined");
a0d0e21e 1873
aea4f609
DM		 1874 if (CvDEPTH(cv) >= 1 && !(PL_debug & DEBUG_DB_RECURSE_FLAG))
1875 /* don't do recursive DB::DB call */
a0d0e21e 1876 return NORMAL;
748a9306 1877
a57c6685 1878 ENTER;
4633a7c4
LW		 1879 SAVETMPS;
1880
3280af22 1881 SAVEI32(PL_debug);
55497cff 1882 SAVESTACK_POS();
3280af22 1883 PL_debug = 0;
748a9306 1884 hasargs = 0;
924508f0 1885 SPAGAIN;
748a9306 1886
aed2304a 1887 if (CvISXSUB(cv)) {
c127bd3a
SF		 1888 CvDEPTH(cv)++;
1889 PUSHMARK(SP);
1890 (void)(*CvXSUB(cv))(aTHX_ cv);
1891 CvDEPTH(cv)--;
1892 FREETMPS;
a57c6685 1893 LEAVE;
c127bd3a
SF		 1894 return NORMAL;
1895 }
1896 else {
1897 PUSHBLOCK(cx, CXt_SUB, SP);
1898 PUSHSUB_DB(cx);
1899 cx->blk_sub.retop = PL_op->op_next;
1900 CvDEPTH(cv)++;
1901 SAVECOMPPAD();
1902 PAD_SET_CUR_NOSAVE(CvPADLIST(cv), 1);
1903 RETURNOP(CvSTART(cv));
1904 }
a0d0e21e
LW		 1905 }
1906 else
1907 return NORMAL;
1908}
1909
a0d0e21e
LW		 1910PP(pp_enteriter)
1911{
27da23d5 1912 dVAR; dSP; dMARK;
c09156bb 1913 register PERL_CONTEXT *cx;
f54cb97a 1914 const I32 gimme = GIMME_V;
a0d0e21e 1915 SV **svp;
840fe433 1916 U8 cxtype = CXt_LOOP_FOR;
7766f137 1917#ifdef USE_ITHREADS
e846cb92 1918 PAD *iterdata;
7766f137 1919#endif
a0d0e21e 1920
d343c3ef 1921 ENTER_with_name("loop1");
4633a7c4
LW		 1922 SAVETMPS;
1923
533c011a 1924 if (PL_op->op_targ) {
14f338dc
DM		 1925 if (PL_op->op_private & OPpLVAL_INTRO) { /* for my $x (...) */
1926 SvPADSTALE_off(PAD_SVl(PL_op->op_targ));
1927 SAVESETSVFLAGS(PAD_SVl(PL_op->op_targ),
1928 SVs_PADSTALE, SVs_PADSTALE);
1929 }
09edbca0 1930 SAVEPADSVANDMORTALIZE(PL_op->op_targ);
c3564e5c 1931#ifndef USE_ITHREADS
dd2155a4 1932 svp = &PAD_SVl(PL_op->op_targ); /* "my" variable */
c3564e5c 1933#else
e846cb92 1934 iterdata = NULL;
7766f137 1935#endif
54b9620d
MB		 1936 }
1937 else {
159b6efe 1938 GV * const gv = MUTABLE_GV(POPs);
7766f137 1939 svp = &GvSV(gv); /* symbol table variable */
0214ae40 1940 SAVEGENERICSV(*svp);
561b68a9 1941 *svp = newSV(0);
7766f137 1942#ifdef USE_ITHREADS
e846cb92 1943 iterdata = (PAD*)gv;
7766f137 1944#endif
54b9620d 1945 }
4633a7c4 1946
0d863452
RH		 1947 if (PL_op->op_private & OPpITER_DEF)
1948 cxtype |= CXp_FOR_DEF;
1949
d343c3ef 1950 ENTER_with_name("loop2");
a0d0e21e 1951
7766f137
GS		 1952 PUSHBLOCK(cx, cxtype, SP);
1953#ifdef USE_ITHREADS
e846cb92 1954 PUSHLOOP_FOR(cx, iterdata, MARK, PL_op->op_targ);
7766f137 1955#else
52d1f6fb 1956 PUSHLOOP_FOR(cx, svp, MARK, 0);
7766f137 1957#endif
533c011a 1958 if (PL_op->op_flags & OPf_STACKED) {
d01136d6
BS		 1959 SV *maybe_ary = POPs;
1960 if (SvTYPE(maybe_ary) != SVt_PVAV) {
89ea2908 1961 dPOPss;
d01136d6 1962 SV * const right = maybe_ary;
984a4bea
RD		 1963 SvGETMAGIC(sv);
1964 SvGETMAGIC(right);
4fe3f0fa 1965 if (RANGE_IS_NUMERIC(sv,right)) {
d01136d6 1966 cx->cx_type &= ~CXTYPEMASK;
c6fdafd0
NC		 1967 cx->cx_type |= CXt_LOOP_LAZYIV;
1968 /* Make sure that no-one re-orders cop.h and breaks our
1969 assumptions */
1970 assert(CxTYPE(cx) == CXt_LOOP_LAZYIV);
a2309040
JH		 1971#ifdef NV_PRESERVES_UV
1972 if ((SvOK(sv) && ((SvNV(sv) < (NV)IV_MIN) ||
1973 (SvNV(sv) > (NV)IV_MAX)))
1974 ||
1975 (SvOK(right) && ((SvNV(right) > (NV)IV_MAX) ||
1976 (SvNV(right) < (NV)IV_MIN))))
1977#else
1978 if ((SvOK(sv) && ((SvNV(sv) <= (NV)IV_MIN)
1979 ||
1980 ((SvNV(sv) > 0) &&
1981 ((SvUV(sv) > (UV)IV_MAX) ||
1982 (SvNV(sv) > (NV)UV_MAX)))))
1983 ||
1984 (SvOK(right) && ((SvNV(right) <= (NV)IV_MIN)
1985 ||
1986 ((SvNV(right) > 0) &&
1987 ((SvUV(right) > (UV)IV_MAX) ||
1988 (SvNV(right) > (NV)UV_MAX))))))
1989#endif
076d9a11 1990 DIE(aTHX_ "Range iterator outside integer range");
d01136d6
BS		 1991 cx->blk_loop.state_u.lazyiv.cur = SvIV(sv);
1992 cx->blk_loop.state_u.lazyiv.end = SvIV(right);
d4665a05
DM		 1993#ifdef DEBUGGING
1994 /* for correct -Dstv display */
1995 cx->blk_oldsp = sp - PL_stack_base;
1996#endif
89ea2908 1997 }
3f63a782 1998 else {
d01136d6
BS		 1999 cx->cx_type &= ~CXTYPEMASK;
2000 cx->cx_type |= CXt_LOOP_LAZYSV;
2001 /* Make sure that no-one re-orders cop.h and breaks our
2002 assumptions */
2003 assert(CxTYPE(cx) == CXt_LOOP_LAZYSV);
2004 cx->blk_loop.state_u.lazysv.cur = newSVsv(sv);
2005 cx->blk_loop.state_u.lazysv.end = right;
2006 SvREFCNT_inc(right);
2007 (void) SvPV_force_nolen(cx->blk_loop.state_u.lazysv.cur);
267cc4a8
NC		 2008 /* This will do the upgrade to SVt_PV, and warn if the value
2009 is uninitialised. */
10516c54 2010 (void) SvPV_nolen_const(right);
267cc4a8
NC		 2011 /* Doing this avoids a check every time in pp_iter in pp_hot.c
2012 to replace !SvOK() with a pointer to "". */
2013 if (!SvOK(right)) {
2014 SvREFCNT_dec(right);
d01136d6 2015 cx->blk_loop.state_u.lazysv.end = &PL_sv_no;
267cc4a8 2016 }
3f63a782 2017 }
89ea2908 2018 }
d01136d6 2019 else /* SvTYPE(maybe_ary) == SVt_PVAV */ {
502c6561 2020 cx->blk_loop.state_u.ary.ary = MUTABLE_AV(maybe_ary);
d01136d6
BS		 2021 SvREFCNT_inc(maybe_ary);
2022 cx->blk_loop.state_u.ary.ix =
2023 (PL_op->op_private & OPpITER_REVERSED) ?
2024 AvFILL(cx->blk_loop.state_u.ary.ary) + 1 :
2025 -1;
ef3e5ea9 2026 }
89ea2908 2027 }
d01136d6
BS		 2028 else { /* iterating over items on the stack */
2029 cx->blk_loop.state_u.ary.ary = NULL; /* means to use the stack */
ef3e5ea9 2030 if (PL_op->op_private & OPpITER_REVERSED) {
d01136d6 2031 cx->blk_loop.state_u.ary.ix = cx->blk_oldsp + 1;
ef3e5ea9
NC		 2032 }
2033 else {
d01136d6 2034 cx->blk_loop.state_u.ary.ix = MARK - PL_stack_base;
ef3e5ea9 2035 }
4633a7c4 2036 }
a0d0e21e
LW		 2037
2038 RETURN;
2039}
2040
2041PP(pp_enterloop)
2042{
27da23d5 2043 dVAR; dSP;
c09156bb 2044 register PERL_CONTEXT *cx;
f54cb97a 2045 const I32 gimme = GIMME_V;
a0d0e21e 2046
d343c3ef 2047 ENTER_with_name("loop1");
a0d0e21e 2048 SAVETMPS;
d343c3ef 2049 ENTER_with_name("loop2");
a0d0e21e 2050
3b719c58
NC		 2051 PUSHBLOCK(cx, CXt_LOOP_PLAIN, SP);
2052 PUSHLOOP_PLAIN(cx, SP);
a0d0e21e
LW		 2053
2054 RETURN;
2055}
2056
2057PP(pp_leaveloop)
2058{
27da23d5 2059 dVAR; dSP;
c09156bb 2060 register PERL_CONTEXT *cx;
a0d0e21e
LW		 2061 I32 gimme;
2062 SV **newsp;
2063 PMOP *newpm;
2064 SV **mark;
2065
2066 POPBLOCK(cx,newpm);
3b719c58 2067 assert(CxTYPE_is_LOOP(cx));
4fdae800 2068 mark = newsp;
a8bba7fa 2069 newsp = PL_stack_base + cx->blk_loop.resetsp;
f86702cc 2070
a1f49e72 2071 TAINT_NOT;
54310121 2072 if (gimme == G_VOID)
6f207bd3 2073 NOOP;
54310121 2074 else if (gimme == G_SCALAR) {
2075 if (mark < SP)
2076 *++newsp = sv_mortalcopy(*SP);
2077 else
3280af22 2078 *++newsp = &PL_sv_undef;
a0d0e21e
LW		 2079 }
2080 else {
a1f49e72 2081 while (mark < SP) {
a0d0e21e 2082 *++newsp = sv_mortalcopy(*++mark);
a1f49e72
CS		 2083 TAINT_NOT; /* Each item is independent */
2084 }
a0d0e21e 2085 }
f86702cc 2086 SP = newsp;
2087 PUTBACK;
2088
a8bba7fa 2089 POPLOOP(cx); /* Stack values are safe: release loop vars ... */
3280af22 2090 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2091
d343c3ef
GG		 2092 LEAVE_with_name("loop2");
2093 LEAVE_with_name("loop1");
a0d0e21e 2094
f86702cc 2095 return NORMAL;
a0d0e21e
LW		 2096}
2097
2098PP(pp_return)
2099{
27da23d5 2100 dVAR; dSP; dMARK;
c09156bb 2101 register PERL_CONTEXT *cx;
f86702cc 2102 bool popsub2 = FALSE;
b45de488 2103 bool clear_errsv = FALSE;
a0d0e21e
LW		 2104 I32 gimme;
2105 SV **newsp;
2106 PMOP *newpm;
2107 I32 optype = 0;
b6494f15 2108 SV *namesv;
b0d9ce38 2109 SV *sv;
b263a1ad 2110 OP *retop = NULL;
a0d0e21e 2111
0bd48802
AL		 2112 const I32 cxix = dopoptosub(cxstack_ix);
2113
9850bf21
RH		 2114 if (cxix < 0) {
2115 if (CxMULTICALL(cxstack)) { /* In this case we must be in a
2116 * sort block, which is a CXt_NULL
2117 * not a CXt_SUB */
2118 dounwind(0);
d7507f74
RH		 2119 PL_stack_base[1] = *PL_stack_sp;
2120 PL_stack_sp = PL_stack_base + 1;
a0d0e21e
LW		 2121 return 0;
2122 }
9850bf21
RH		 2123 else
2124 DIE(aTHX_ "Can't return outside a subroutine");
a0d0e21e 2125 }
a0d0e21e
LW		 2126 if (cxix < cxstack_ix)
2127 dounwind(cxix);
2128
d7507f74
RH		 2129 if (CxMULTICALL(&cxstack[cxix])) {
2130 gimme = cxstack[cxix].blk_gimme;
2131 if (gimme == G_VOID)
2132 PL_stack_sp = PL_stack_base;
2133 else if (gimme == G_SCALAR) {
2134 PL_stack_base[1] = *PL_stack_sp;
2135 PL_stack_sp = PL_stack_base + 1;
2136 }
9850bf21 2137 return 0;
d7507f74 2138 }
9850bf21 2139
a0d0e21e 2140 POPBLOCK(cx,newpm);
6b35e009 2141 switch (CxTYPE(cx)) {
a0d0e21e 2142 case CXt_SUB:
f86702cc 2143 popsub2 = TRUE;
f39bc417 2144 retop = cx->blk_sub.retop;
5dd42e15 2145 cxstack_ix++; /* preserve cx entry on stack for use by POPSUB */
a0d0e21e
LW		 2146 break;
2147 case CXt_EVAL:
b45de488
GS		 2148 if (!(PL_in_eval & EVAL_KEEPERR))
2149 clear_errsv = TRUE;
a0d0e21e 2150 POPEVAL(cx);
b6494f15 2151 namesv = cx->blk_eval.old_namesv;
f39bc417 2152 retop = cx->blk_eval.retop;
1d76a5c3
GS		 2153 if (CxTRYBLOCK(cx))
2154 break;
067f92a0 2155 lex_end();
748a9306
LW		 2156 if (optype == OP_REQUIRE &&
2157 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
2158 {
54310121 2159 /* Unassume the success we assumed earlier. */
b6494f15
VP		 2160 (void)hv_delete(GvHVn(PL_incgv),
2161 SvPVX_const(namesv), SvCUR(namesv),
2162 G_DISCARD);
2163 DIE(aTHX_ "%"SVf" did not return a true value", SVfARG(namesv));
748a9306 2164 }
a0d0e21e 2165 break;
7766f137
GS		 2166 case CXt_FORMAT:
2167 POPFORMAT(cx);
f39bc417 2168 retop = cx->blk_sub.retop;
7766f137 2169 break;
a0d0e21e 2170 default:
cea2e8a9 2171 DIE(aTHX_ "panic: return");
a0d0e21e
LW		 2172 }
2173
a1f49e72 2174 TAINT_NOT;
a0d0e21e 2175 if (gimme == G_SCALAR) {
a29cdaf0
IZ		 2176 if (MARK < SP) {
2177 if (popsub2) {
a8bba7fa 2178 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
a29cdaf0
IZ		 2179 if (SvTEMP(TOPs)) {
2180 *++newsp = SvREFCNT_inc(*SP);
2181 FREETMPS;
2182 sv_2mortal(*newsp);
959e3673
GS		 2183 }
2184 else {
2185 sv = SvREFCNT_inc(*SP); /* FREETMPS could clobber it */
a29cdaf0 2186 FREETMPS;
959e3673
GS		 2187 *++newsp = sv_mortalcopy(sv);
2188 SvREFCNT_dec(sv);
a29cdaf0 2189 }
959e3673
GS		 2190 }
2191 else
a29cdaf0 2192 *++newsp = (SvTEMP(*SP)) ? *SP : sv_mortalcopy(*SP);
959e3673
GS		 2193 }
2194 else
a29cdaf0 2195 *++newsp = sv_mortalcopy(*SP);
959e3673
GS		 2196 }
2197 else
3280af22 2198 *++newsp = &PL_sv_undef;
a0d0e21e 2199 }
54310121 2200 else if (gimme == G_ARRAY) {
a1f49e72 2201 while (++MARK <= SP) {
f86702cc 2202 *++newsp = (popsub2 && SvTEMP(*MARK))
2203 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS		 2204 TAINT_NOT; /* Each item is independent */
2205 }
a0d0e21e 2206 }
3280af22 2207 PL_stack_sp = newsp;
a0d0e21e 2208
5dd42e15 2209 LEAVE;
f86702cc 2210 /* Stack values are safe: */
2211 if (popsub2) {
5dd42e15 2212 cxstack_ix--;
b0d9ce38 2213 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2214 }
b0d9ce38 2215 else
c445ea15 2216 sv = NULL;
3280af22 2217 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2218
b0d9ce38 2219 LEAVESUB(sv);
8433848b 2220 if (clear_errsv) {
ab69dbc2 2221 CLEAR_ERRSV();
8433848b 2222 }
f39bc417 2223 return retop;
a0d0e21e
LW		 2224}
2225
2226PP(pp_last)
2227{
27da23d5 2228 dVAR; dSP;
a0d0e21e 2229 I32 cxix;
c09156bb 2230 register PERL_CONTEXT *cx;
f86702cc 2231 I32 pop2 = 0;
a0d0e21e 2232 I32 gimme;
8772537c 2233 I32 optype;
b263a1ad 2234 OP *nextop = NULL;
a0d0e21e
LW		 2235 SV **newsp;
2236 PMOP *newpm;
a8bba7fa 2237 SV **mark;
c445ea15 2238 SV *sv = NULL;
9d4ba2ae 2239
a0d0e21e 2240
533c011a 2241 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW		 2242 cxix = dopoptoloop(cxstack_ix);
2243 if (cxix < 0)
a651a37d 2244 DIE(aTHX_ "Can't \"last\" outside a loop block");
a0d0e21e
LW		 2245 }
2246 else {
2247 cxix = dopoptolabel(cPVOP->op_pv);
2248 if (cxix < 0)
cea2e8a9 2249 DIE(aTHX_ "Label not found for \"last %s\"", cPVOP->op_pv);
a0d0e21e
LW		 2250 }
2251 if (cxix < cxstack_ix)
2252 dounwind(cxix);
2253
2254 POPBLOCK(cx,newpm);
5dd42e15 2255 cxstack_ix++; /* temporarily protect top context */
a8bba7fa 2256 mark = newsp;
6b35e009 2257 switch (CxTYPE(cx)) {
c6fdafd0 2258 case CXt_LOOP_LAZYIV:
d01136d6 2259 case CXt_LOOP_LAZYSV:
3b719c58
NC		 2260 case CXt_LOOP_FOR:
2261 case CXt_LOOP_PLAIN:
2262 pop2 = CxTYPE(cx);
a8bba7fa 2263 newsp = PL_stack_base + cx->blk_loop.resetsp;
022eaa24 2264 nextop = cx->blk_loop.my_op->op_lastop->op_next;
a0d0e21e 2265 break;
f86702cc 2266 case CXt_SUB:
f86702cc 2267 pop2 = CXt_SUB;
f39bc417 2268 nextop = cx->blk_sub.retop;
a0d0e21e 2269 break;
f86702cc 2270 case CXt_EVAL:
2271 POPEVAL(cx);
f39bc417 2272 nextop = cx->blk_eval.retop;
a0d0e21e 2273 break;
7766f137
GS		 2274 case CXt_FORMAT:
2275 POPFORMAT(cx);
f39bc417 2276 nextop = cx->blk_sub.retop;
7766f137 2277 break;
a0d0e21e 2278 default:
cea2e8a9 2279 DIE(aTHX_ "panic: last");
a0d0e21e
LW		 2280 }
2281
a1f49e72 2282 TAINT_NOT;
a0d0e21e 2283 if (gimme == G_SCALAR) {
f86702cc 2284 if (MARK < SP)
2285 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*SP))
2286 ? *SP : sv_mortalcopy(*SP);
a0d0e21e 2287 else
3280af22 2288 *++newsp = &PL_sv_undef;
a0d0e21e 2289 }
54310121 2290 else if (gimme == G_ARRAY) {
a1f49e72 2291 while (++MARK <= SP) {
f86702cc 2292 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*MARK))
2293 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS		 2294 TAINT_NOT; /* Each item is independent */
2295 }
f86702cc 2296 }
2297 SP = newsp;
2298 PUTBACK;
2299
5dd42e15
DM		 2300 LEAVE;
2301 cxstack_ix--;
f86702cc 2302 /* Stack values are safe: */
2303 switch (pop2) {
c6fdafd0 2304 case CXt_LOOP_LAZYIV:
3b719c58 2305 case CXt_LOOP_PLAIN:
d01136d6 2306 case CXt_LOOP_LAZYSV:
3b719c58 2307 case CXt_LOOP_FOR:
a8bba7fa 2308 POPLOOP(cx); /* release loop vars ... */
4fdae800 2309 LEAVE;
f86702cc 2310 break;
2311 case CXt_SUB:
b0d9ce38 2312 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2313 break;
a0d0e21e 2314 }
3280af22 2315 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 2316
b0d9ce38 2317 LEAVESUB(sv);
9d4ba2ae
AL		 2318 PERL_UNUSED_VAR(optype);
2319 PERL_UNUSED_VAR(gimme);
f86702cc 2320 return nextop;
a0d0e21e
LW		 2321}
2322
2323PP(pp_next)
2324{
27da23d5 2325 dVAR;
a0d0e21e 2326 I32 cxix;
c09156bb 2327 register PERL_CONTEXT *cx;
85538317 2328 I32 inner;
a0d0e21e 2329
533c011a 2330 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW		 2331 cxix = dopoptoloop(cxstack_ix);
2332 if (cxix < 0)
a651a37d 2333 DIE(aTHX_ "Can't \"next\" outside a loop block");
a0d0e21e
LW		 2334 }
2335 else {
2336 cxix = dopoptolabel(cPVOP->op_pv);
2337 if (cxix < 0)
cea2e8a9 2338 DIE(aTHX_ "Label not found for \"next %s\"", cPVOP->op_pv);
a0d0e21e
LW		 2339 }
2340 if (cxix < cxstack_ix)
2341 dounwind(cxix);
2342
85538317
GS		 2343 /* clear off anything above the scope we're re-entering, but
2344 * save the rest until after a possible continue block */
2345 inner = PL_scopestack_ix;
1ba6ee2b 2346 TOPBLOCK(cx);
85538317
GS		 2347 if (PL_scopestack_ix < inner)
2348 leave_scope(PL_scopestack[PL_scopestack_ix]);
3a1b2b9e 2349 PL_curcop = cx->blk_oldcop;
022eaa24 2350 return CX_LOOP_NEXTOP_GET(cx);
a0d0e21e
LW		 2351}
2352
2353PP(pp_redo)
2354{
27da23d5 2355 dVAR;
a0d0e21e 2356 I32 cxix;
c09156bb 2357 register PERL_CONTEXT *cx;
a0d0e21e 2358 I32 oldsave;
a034e688 2359 OP* redo_op;
a0d0e21e 2360
533c011a 2361 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW		 2362 cxix = dopoptoloop(cxstack_ix);
2363 if (cxix < 0)
a651a37d 2364 DIE(aTHX_ "Can't \"redo\" outside a loop block");
a0d0e21e
LW		 2365 }
2366 else {
2367 cxix = dopoptolabel(cPVOP->op_pv);
2368 if (cxix < 0)
cea2e8a9 2369 DIE(aTHX_ "Label not found for \"redo %s\"", cPVOP->op_pv);
a0d0e21e
LW		 2370 }
2371 if (cxix < cxstack_ix)
2372 dounwind(cxix);
2373
022eaa24 2374 redo_op = cxstack[cxix].blk_loop.my_op->op_redoop;
a034e688
DM		 2375 if (redo_op->op_type == OP_ENTER) {
2376 /* pop one less context to avoid $x being freed in while (my $x..) */
2377 cxstack_ix++;
2378 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_BLOCK);
2379 redo_op = redo_op->op_next;
2380 }
2381
a0d0e21e 2382 TOPBLOCK(cx);
3280af22 2383 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e 2384 LEAVE_SCOPE(oldsave);
936c78b5 2385 FREETMPS;
3a1b2b9e 2386 PL_curcop = cx->blk_oldcop;
a034e688 2387 return redo_op;
a0d0e21e
LW		 2388}
2389
0824fdcb 2390STATIC OP *
bfed75c6 2391S_dofindlabel(pTHX_ OP *o, const char *label, OP **opstack, OP **oplimit)
a0d0e21e 2392{
97aff369 2393 dVAR;
a0d0e21e 2394 OP **ops = opstack;
bfed75c6 2395 static const char too_deep[] = "Target of goto is too deeply nested";
a0d0e21e 2396
7918f24d
NC		 2397 PERL_ARGS_ASSERT_DOFINDLABEL;
2398
fc36a67e 2399 if (ops >= oplimit)
cea2e8a9 2400 Perl_croak(aTHX_ too_deep);
11343788
MB		 2401 if (o->op_type == OP_LEAVE ||
2402 o->op_type == OP_SCOPE ||
2403 o->op_type == OP_LEAVELOOP ||
33d34e4c 2404 o->op_type == OP_LEAVESUB ||
11343788 2405 o->op_type == OP_LEAVETRY)
fc36a67e 2406 {
5dc0d613 2407 *ops++ = cUNOPo->op_first;
fc36a67e 2408 if (ops >= oplimit)
cea2e8a9 2409 Perl_croak(aTHX_ too_deep);
fc36a67e 2410 }
c4aa4e48 2411 *ops = 0;
11343788 2412 if (o->op_flags & OPf_KIDS) {
aec46f14 2413 OP *kid;
a0d0e21e 2414 /* First try all the kids at this level, since that's likeliest. */
11343788 2415 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
7e8f1eac
AD		 2416 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
2417 const char *kid_label = CopLABEL(kCOP);
2418 if (kid_label && strEQ(kid_label, label))
2419 return kid;
2420 }
a0d0e21e 2421 }
11343788 2422 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
3280af22 2423 if (kid == PL_lastgotoprobe)
a0d0e21e 2424 continue;
ed8d0fe2
SM		 2425 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
2426 if (ops == opstack)
2427 *ops++ = kid;
2428 else if (ops[-1]->op_type == OP_NEXTSTATE ||
2429 ops[-1]->op_type == OP_DBSTATE)
2430 ops[-1] = kid;
2431 else
2432 *ops++ = kid;
2433 }
155aba94 2434 if ((o = dofindlabel(kid, label, ops, oplimit)))
11343788 2435 return o;
a0d0e21e
LW		 2436 }
2437 }
c4aa4e48 2438 *ops = 0;
a0d0e21e
LW		 2439 return 0;
2440}
2441
a0d0e21e
LW		 2442PP(pp_goto)
2443{
27da23d5 2444 dVAR; dSP;
cbbf8932 2445 OP *retop = NULL;
a0d0e21e 2446 I32 ix;
c09156bb 2447 register PERL_CONTEXT *cx;
fc36a67e 2448#define GOTO_DEPTH 64
2449 OP *enterops[GOTO_DEPTH];
cbbf8932 2450 const char *label = NULL;
bfed75c6
AL		 2451 const bool do_dump = (PL_op->op_type == OP_DUMP);
2452 static const char must_have_label[] = "goto must have label";
a0d0e21e 2453
533c011a 2454 if (PL_op->op_flags & OPf_STACKED) {
9d4ba2ae 2455 SV * const sv = POPs;
a0d0e21e
LW		 2456
2457 /* This egregious kludge implements goto &subroutine */
2458 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
2459 I32 cxix;
c09156bb 2460 register PERL_CONTEXT *cx;
ea726b52 2461 CV *cv = MUTABLE_CV(SvRV(sv));
a0d0e21e
LW		 2462 SV** mark;
2463 I32 items = 0;
2464 I32 oldsave;
b1464ded 2465 bool reified = 0;
a0d0e21e 2466
e8f7dd13 2467 retry:
4aa0a1f7 2468 if (!CvROOT(cv) && !CvXSUB(cv)) {
7fc63493 2469 const GV * const gv = CvGV(cv);
e8f7dd13 2470 if (gv) {
7fc63493 2471 GV *autogv;
e8f7dd13
GS		 2472 SV *tmpstr;
2473 /* autoloaded stub? */
2474 if (cv != GvCV(gv) && (cv = GvCV(gv)))
2475 goto retry;
2476 autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv),
2477 GvNAMELEN(gv), FALSE);
2478 if (autogv && (cv = GvCV(autogv)))
2479 goto retry;
2480 tmpstr = sv_newmortal();
c445ea15 2481 gv_efullname3(tmpstr, gv, NULL);
be2597df 2482 DIE(aTHX_ "Goto undefined subroutine &%"SVf"", SVfARG(tmpstr));
4aa0a1f7 2483 }
cea2e8a9 2484 DIE(aTHX_ "Goto undefined subroutine");
4aa0a1f7
AD		 2485 }
2486
a0d0e21e 2487 /* First do some returnish stuff. */
b37c2d43 2488 SvREFCNT_inc_simple_void(cv); /* avoid premature free during unwind */
71fc2216 2489 FREETMPS;
a0d0e21e
LW		 2490 cxix = dopoptosub(cxstack_ix);
2491 if (cxix < 0)
cea2e8a9 2492 DIE(aTHX_ "Can't goto subroutine outside a subroutine");
a0d0e21e
LW		 2493 if (cxix < cxstack_ix)
2494 dounwind(cxix);
2495 TOPBLOCK(cx);
2d43a17f 2496 SPAGAIN;
564abe23 2497 /* ban goto in eval: see <20050521150056.GC20213@iabyn.com> */
2d43a17f 2498 if (CxTYPE(cx) == CXt_EVAL) {
c74ace89
DM		 2499 if (CxREALEVAL(cx))
2500 DIE(aTHX_ "Can't goto subroutine from an eval-string");
2501 else
2502 DIE(aTHX_ "Can't goto subroutine from an eval-block");
2d43a17f 2503 }
9850bf21
RH		 2504 else if (CxMULTICALL(cx))
2505 DIE(aTHX_ "Can't goto subroutine from a sort sub (or similar callback)");
bafb2adc 2506 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)) {
d8b46c1b 2507 /* put @_ back onto stack */
a0d0e21e 2508 AV* av = cx->blk_sub.argarray;
bfed75c6 2509
93965878 2510 items = AvFILLp(av) + 1;
a45cdc79
DM		 2511 EXTEND(SP, items+1); /* @_ could have been extended. */
2512 Copy(AvARRAY(av), SP + 1, items, SV*);
3280af22
NIS		 2513 SvREFCNT_dec(GvAV(PL_defgv));
2514 GvAV(PL_defgv) = cx->blk_sub.savearray;
b1464ded 2515 CLEAR_ARGARRAY(av);
d8b46c1b 2516 /* abandon @_ if it got reified */
62b1ebc2 2517 if (AvREAL(av)) {
b1464ded
DM		 2518 reified = 1;
2519 SvREFCNT_dec(av);
d8b46c1b
GS		 2520 av = newAV();
2521 av_extend(av, items-1);
11ca45c0 2522 AvREIFY_only(av);
ad64d0ec 2523 PAD_SVl(0) = MUTABLE_SV(cx->blk_sub.argarray = av);
62b1ebc2 2524 }
a0d0e21e 2525 }
aed2304a 2526 else if (CvISXSUB(cv)) { /* put GvAV(defgv) back onto stack */
890ce7af 2527 AV* const av = GvAV(PL_defgv);
1fa4e549 2528 items = AvFILLp(av) + 1;
a45cdc79
DM		 2529 EXTEND(SP, items+1); /* @_ could have been extended. */
2530 Copy(AvARRAY(av), SP + 1, items, SV*);
1fa4e549 2531 }
a45cdc79
DM		 2532 mark = SP;
2533 SP += items;
6b35e009 2534 if (CxTYPE(cx) == CXt_SUB &&
b150fb22 2535 !(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
a0d0e21e 2536 SvREFCNT_dec(cx->blk_sub.cv);
3280af22 2537 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e
LW		 2538 LEAVE_SCOPE(oldsave);
2539
2540 /* Now do some callish stuff. */
2541 SAVETMPS;
5023d17a 2542 SAVEFREESV(cv); /* later, undo the 'avoid premature free' hack */
aed2304a 2543 if (CvISXSUB(cv)) {
b37c2d43 2544 OP* const retop = cx->blk_sub.retop;
f73ef291
NC		 2545 SV **newsp;
2546 I32 gimme;
b1464ded
DM		 2547 if (reified) {
2548 I32 index;
2549 for (index=0; index<items; index++)
2550 sv_2mortal(SP[-index]);
2551 }
1fa4e549 2552
b37c2d43
AL		 2553 /* XS subs don't have a CxSUB, so pop it */
2554 POPBLOCK(cx, PL_curpm);
2555 /* Push a mark for the start of arglist */
2556 PUSHMARK(mark);
2557 PUTBACK;
2558 (void)(*CvXSUB(cv))(aTHX_ cv);
a57c6685 2559 LEAVE;
5eff7df7 2560 return retop;
a0d0e21e
LW		 2561 }
2562 else {
b37c2d43 2563 AV* const padlist = CvPADLIST(cv);
6b35e009 2564 if (CxTYPE(cx) == CXt_EVAL) {
85a64632 2565 PL_in_eval = CxOLD_IN_EVAL(cx);
3280af22 2566 PL_eval_root = cx->blk_eval.old_eval_root;
b150fb22 2567 cx->cx_type = CXt_SUB;
b150fb22 2568 }
a0d0e21e 2569 cx->blk_sub.cv = cv;
1a5b3db4 2570 cx->blk_sub.olddepth = CvDEPTH(cv);
dd2155a4 2571
a0d0e21e
LW		 2572 CvDEPTH(cv)++;
2573 if (CvDEPTH(cv) < 2)
74c765eb 2574 SvREFCNT_inc_simple_void_NN(cv);
dd2155a4 2575 else {
2b9dff67 2576 if (CvDEPTH(cv) == PERL_SUB_DEPTH_WARN && ckWARN(WARN_RECURSION))
44a8e56a 2577 sub_crush_depth(cv);
26019298 2578 pad_push(padlist, CvDEPTH(cv));
a0d0e21e 2579 }
fd617465
DM		 2580 SAVECOMPPAD();
2581 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
bafb2adc 2582 if (CxHASARGS(cx))
6d4ff0d2 2583 {
502c6561 2584 AV *const av = MUTABLE_AV(PAD_SVl(0));
a0d0e21e 2585
3280af22 2586 cx->blk_sub.savearray = GvAV(PL_defgv);
502c6561 2587 GvAV(PL_defgv) = MUTABLE_AV(SvREFCNT_inc_simple(av));
dd2155a4 2588 CX_CURPAD_SAVE(cx->blk_sub);
6d4ff0d2 2589 cx->blk_sub.argarray = av;
a0d0e21e
LW		 2590
2591 if (items >= AvMAX(av) + 1) {
b37c2d43 2592 SV **ary = AvALLOC(av);
a0d0e21e
LW		 2593 if (AvARRAY(av) != ary) {
2594 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
9c6bc640 2595 AvARRAY(av) = ary;
a0d0e21e
LW		 2596 }
2597 if (items >= AvMAX(av) + 1) {
2598 AvMAX(av) = items - 1;
2599 Renew(ary,items+1,SV*);
2600 AvALLOC(av) = ary;
9c6bc640 2601 AvARRAY(av) = ary;
a0d0e21e
LW		 2602 }
2603 }
a45cdc79 2604 ++mark;
a0d0e21e 2605 Copy(mark,AvARRAY(av),items,SV*);
93965878 2606 AvFILLp(av) = items - 1;
d8b46c1b 2607 assert(!AvREAL(av));
b1464ded
DM		 2608 if (reified) {
2609 /* transfer 'ownership' of refcnts to new @_ */
2610 AvREAL_on(av);
2611 AvREIFY_off(av);
2612 }
a0d0e21e
LW		 2613 while (items--) {
2614 if (*mark)
2615 SvTEMP_off(*mark);
2616 mark++;
2617 }
2618 }
491527d0 2619 if (PERLDB_SUB) { /* Checking curstash breaks DProf. */
005a8a35 2620 Perl_get_db_sub(aTHX_ NULL, cv);
b37c2d43 2621 if (PERLDB_GOTO) {
b96d8cd9 2622 CV * const gotocv = get_cvs("DB::goto", 0);
b37c2d43
AL		 2623 if (gotocv) {
2624 PUSHMARK( PL_stack_sp );
ad64d0ec 2625 call_sv(MUTABLE_SV(gotocv), G_SCALAR | G_NODEBUG);
b37c2d43
AL		 2626 PL_stack_sp--;
2627 }
491527d0 2628 }
1ce6579f 2629 }
a0d0e21e
LW		 2630 RETURNOP(CvSTART(cv));
2631 }
2632 }
1614b0e3 2633 else {
0510663f 2634 label = SvPV_nolen_const(sv);
1614b0e3 2635 if (!(do_dump || *label))
cea2e8a9 2636 DIE(aTHX_ must_have_label);
1614b0e3 2637 }
a0d0e21e 2638 }
533c011a 2639 else if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 2640 if (! do_dump)
cea2e8a9 2641 DIE(aTHX_ must_have_label);
a0d0e21e
LW		 2642 }
2643 else
2644 label = cPVOP->op_pv;
2645
f410a211
NC		 2646 PERL_ASYNC_CHECK();
2647
a0d0e21e 2648 if (label && *label) {
cbbf8932 2649 OP *gotoprobe = NULL;
3b2447bc 2650 bool leaving_eval = FALSE;
33d34e4c 2651 bool in_block = FALSE;
cbbf8932 2652 PERL_CONTEXT *last_eval_cx = NULL;
a0d0e21e
LW		 2653
2654 /* find label */
2655
d4c19fe8 2656 PL_lastgotoprobe = NULL;
a0d0e21e
LW		 2657 *enterops = 0;
2658 for (ix = cxstack_ix; ix >= 0; ix--) {
2659 cx = &cxstack[ix];
6b35e009 2660 switch (CxTYPE(cx)) {
a0d0e21e 2661 case CXt_EVAL:
3b2447bc 2662 leaving_eval = TRUE;
971ecbe6 2663 if (!CxTRYBLOCK(cx)) {
a4f3a277
RH		 2664 gotoprobe = (last_eval_cx ?
2665 last_eval_cx->blk_eval.old_eval_root :
2666 PL_eval_root);
2667 last_eval_cx = cx;
9c5794fe
RH		 2668 break;
2669 }
2670 /* else fall through */
c6fdafd0 2671 case CXt_LOOP_LAZYIV:
d01136d6 2672 case CXt_LOOP_LAZYSV:
3b719c58
NC		 2673 case CXt_LOOP_FOR:
2674 case CXt_LOOP_PLAIN:
bb5aedc1
VP		 2675 case CXt_GIVEN:
2676 case CXt_WHEN:
a0d0e21e
LW		 2677 gotoprobe = cx->blk_oldcop->op_sibling;
2678 break;
2679 case CXt_SUBST:
2680 continue;
2681 case CXt_BLOCK:
33d34e4c 2682 if (ix) {
a0d0e21e 2683 gotoprobe = cx->blk_oldcop->op_sibling;
33d34e4c
AE		 2684 in_block = TRUE;
2685 } else
3280af22 2686 gotoprobe = PL_main_root;
a0d0e21e 2687 break;
b3933176 2688 case CXt_SUB:
9850bf21 2689 if (CvDEPTH(cx->blk_sub.cv) && !CxMULTICALL(cx)) {
b3933176
CS		 2690 gotoprobe = CvROOT(cx->blk_sub.cv);
2691 break;
2692 }
2693 /* FALL THROUGH */
7766f137 2694 case CXt_FORMAT:
0a753a76 2695 case CXt_NULL:
a651a37d 2696 DIE(aTHX_ "Can't \"goto\" out of a pseudo block");
a0d0e21e
LW		 2697 default:
2698 if (ix)
cea2e8a9 2699 DIE(aTHX_ "panic: goto");
3280af22 2700 gotoprobe = PL_main_root;
a0d0e21e
LW		 2701 break;
2702 }
2b597662
GS		 2703 if (gotoprobe) {
2704 retop = dofindlabel(gotoprobe, label,
2705 enterops, enterops + GOTO_DEPTH);
2706 if (retop)
2707 break;
2708 }
3280af22 2709 PL_lastgotoprobe = gotoprobe;
a0d0e21e
LW		 2710 }
2711 if (!retop)
cea2e8a9 2712 DIE(aTHX_ "Can't find label %s", label);
a0d0e21e 2713
3b2447bc
RH		 2714 /* if we're leaving an eval, check before we pop any frames
2715 that we're not going to punt, otherwise the error
2716 won't be caught */
2717
2718 if (leaving_eval && *enterops && enterops[1]) {
2719 I32 i;
2720 for (i = 1; enterops[i]; i++)
2721 if (enterops[i]->op_type == OP_ENTERITER)
2722 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
2723 }
2724
b500e03b
GG		 2725 if (*enterops && enterops[1]) {
2726 I32 i = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
2727 if (enterops[i])
2728 deprecate("\"goto\" to jump into a construct");
2729 }
2730
a0d0e21e
LW		 2731 /* pop unwanted frames */
2732
2733 if (ix < cxstack_ix) {
2734 I32 oldsave;
2735
2736 if (ix < 0)
2737 ix = 0;
2738 dounwind(ix);
2739 TOPBLOCK(cx);
3280af22 2740 oldsave = PL_scopestack[PL_scopestack_ix];
a0d0e21e
LW		 2741 LEAVE_SCOPE(oldsave);
2742 }
2743
2744 /* push wanted frames */
2745
748a9306 2746 if (*enterops && enterops[1]) {
0bd48802 2747 OP * const oldop = PL_op;
33d34e4c
AE		 2748 ix = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
2749 for (; enterops[ix]; ix++) {
533c011a 2750 PL_op = enterops[ix];
84902520
TB		 2751 /* Eventually we may want to stack the needed arguments
2752 * for each op. For now, we punt on the hard ones. */
533c011a 2753 if (PL_op->op_type == OP_ENTERITER)
894356b3 2754 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
16c91539 2755 PL_op->op_ppaddr(aTHX);
a0d0e21e 2756 }
533c011a 2757 PL_op = oldop;
a0d0e21e
LW		 2758 }
2759 }
2760
2761 if (do_dump) {
a5f75d66 2762#ifdef VMS
6b88bc9c 2763 if (!retop) retop = PL_main_start;
a5f75d66 2764#endif
3280af22
NIS		 2765 PL_restartop = retop;
2766 PL_do_undump = TRUE;
a0d0e21e
LW		 2767
2768 my_unexec();
2769
3280af22
NIS		 2770 PL_restartop = 0; /* hmm, must be GNU unexec().. */
2771 PL_do_undump = FALSE;
a0d0e21e
LW		 2772 }
2773
2774 RETURNOP(retop);
2775}
2776
2777PP(pp_exit)
2778{
97aff369 2779 dVAR;
39644a26 2780 dSP;
a0d0e21e
LW		 2781 I32 anum;
2782
2783 if (MAXARG < 1)
2784 anum = 0;
ff0cee69 2785 else {
a0d0e21e 2786 anum = SvIVx(POPs);
d98f61e7
GS		 2787#ifdef VMS
2788 if (anum == 1 && (PL_op->op_private & OPpEXIT_VMSISH))
ff0cee69 2789 anum = 0;
96e176bf 2790 VMSISH_HUSHED = VMSISH_HUSHED || (PL_op->op_private & OPpHUSH_VMSISH);
ff0cee69 2791#endif
2792 }
cc3604b1 2793 PL_exit_flags |= PERL_EXIT_EXPECTED;
81d86705
NC		 2794#ifdef PERL_MAD
2795 /* KLUDGE: disable exit 0 in BEGIN blocks when we're just compiling */
2796 if (anum || !(PL_minus_c && PL_madskills))
2797 my_exit(anum);
2798#else
a0d0e21e 2799 my_exit(anum);
81d86705 2800#endif
3280af22 2801 PUSHs(&PL_sv_undef);
a0d0e21e
LW		 2802 RETURN;
2803}
2804
a0d0e21e
LW		 2805/* Eval. */
2806
0824fdcb 2807STATIC void
cea2e8a9 2808S_save_lines(pTHX_ AV *array, SV *sv)
a0d0e21e 2809{
504618e9 2810 const char *s = SvPVX_const(sv);
890ce7af 2811 const char * const send = SvPVX_const(sv) + SvCUR(sv);
504618e9 2812 I32 line = 1;
a0d0e21e 2813
7918f24d
NC		 2814 PERL_ARGS_ASSERT_SAVE_LINES;
2815
a0d0e21e 2816 while (s && s < send) {
f54cb97a 2817 const char *t;
b9f83d2f 2818 SV * const tmpstr = newSV_type(SVt_PVMG);
a0d0e21e 2819
1d963ff3 2820 t = (const char *)memchr(s, '\n', send - s);
a0d0e21e
LW		 2821 if (t)
2822 t++;
2823 else
2824 t = send;
2825
2826 sv_setpvn(tmpstr, s, t - s);
2827 av_store(array, line++, tmpstr);
2828 s = t;
2829 }
2830}
2831
22f16304
RU		 2832/*
2833=for apidoc docatch
2834
2835Check for the cases 0 or 3 of cur_env.je_ret, only used inside an eval context.
2836
28370 is used as continue inside eval,
2838
28393 is used for a die caught by an inner eval - continue inner loop
2840
2841See cop.h: je_mustcatch, when set at any runlevel to TRUE, means eval ops must
2842establish a local jmpenv to handle exception traps.
2843
2844=cut
2845*/
0824fdcb 2846STATIC OP *
cea2e8a9 2847S_docatch(pTHX_ OP *o)
1e422769 2848{
97aff369 2849 dVAR;
6224f72b 2850 int ret;
06b5626a 2851 OP * const oldop = PL_op;
db36c5a1 2852 dJMPENV;
1e422769 2853
1e422769 2854#ifdef DEBUGGING
54310121 2855 assert(CATCH_GET == TRUE);
1e422769 2856#endif
312caa8e 2857 PL_op = o;
8bffa5f8 2858
14dd3ad8 2859 JMPENV_PUSH(ret);
6224f72b 2860 switch (ret) {
312caa8e 2861 case 0:
abd70938
DM		 2862 assert(cxstack_ix >= 0);
2863 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
2864 cxstack[cxstack_ix].blk_eval.cur_top_env = PL_top_env;
14dd3ad8 2865 redo_body:
85aaa934 2866 CALLRUNOPS(aTHX);
312caa8e
CS		 2867 break;
2868 case 3:
8bffa5f8 2869 /* die caught by an inner eval - continue inner loop */
febb3a6d
Z		 2870 if (PL_restartop && PL_restartjmpenv == PL_top_env) {
2871 PL_restartjmpenv = NULL;
312caa8e
CS		 2872 PL_op = PL_restartop;
2873 PL_restartop = 0;
2874 goto redo_body;
2875 }
2876 /* FALL THROUGH */
2877 default:
14dd3ad8 2878 JMPENV_POP;
533c011a 2879 PL_op = oldop;
6224f72b 2880 JMPENV_JUMP(ret);
1e422769 2881 /* NOTREACHED */
1e422769 2882 }
14dd3ad8 2883 JMPENV_POP;
533c011a 2884 PL_op = oldop;
5f66b61c 2885 return NULL;
1e422769 2886}
2887
ee23ad3b
NC		 2888/* James Bond: Do you expect me to talk?
2889 Auric Goldfinger: No, Mr. Bond. I expect you to die.
2890
2891 This code is an ugly hack, doesn't work with lexicals in subroutines that are
2892 called more than once, and is only used by regcomp.c, for (?{}) blocks.
2893
2894 Currently it is not used outside the core code. Best if it stays that way.
2895*/
c277df42 2896OP *
bfed75c6 2897Perl_sv_compile_2op(pTHX_ SV *sv, OP** startop, const char *code, PAD** padp)
c277df42
IZ		 2898/* sv Text to convert to OP tree. */
2899/* startop op_free() this to undo. */
2900/* code Short string id of the caller. */
2901{
27da23d5 2902 dVAR; dSP; /* Make POPBLOCK work. */
c277df42
IZ		 2903 PERL_CONTEXT *cx;
2904 SV **newsp;
b094c71d 2905 I32 gimme = G_VOID;
c277df42
IZ		 2906 I32 optype;
2907 OP dummy;
83ee9e09
GS		 2908 char tbuf[TYPE_DIGITS(long) + 12 + 10];
2909 char *tmpbuf = tbuf;
c277df42 2910 char *safestr;
a3985cdc 2911 int runtime;
601f1833 2912 CV* runcv = NULL; /* initialise to avoid compiler warnings */
f7997f86 2913 STRLEN len;
634d6919 2914 bool need_catch;
c277df42 2915
7918f24d
NC		 2916 PERL_ARGS_ASSERT_SV_COMPILE_2OP;
2917
d343c3ef 2918 ENTER_with_name("eval");
5486870f 2919 lex_start(sv, NULL, FALSE);
c277df42
IZ		 2920 SAVETMPS;
2921 /* switch to eval mode */
2922
923e4eb5 2923 if (IN_PERL_COMPILETIME) {
f4dd75d9 2924 SAVECOPSTASH_FREE(&PL_compiling);
11faa288 2925 CopSTASH_set(&PL_compiling, PL_curstash);
cbce877f 2926 }
83ee9e09 2927 if (PERLDB_NAMEEVAL && CopLINE(PL_curcop)) {
9d4ba2ae 2928 SV * const sv = sv_newmortal();
83ee9e09
GS		 2929 Perl_sv_setpvf(aTHX_ sv, "_<(%.10seval %lu)[%s:%"IVdf"]",
2930 code, (unsigned long)++PL_evalseq,
2931 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
2932 tmpbuf = SvPVX(sv);
fc009855 2933 len = SvCUR(sv);
83ee9e09
GS		 2934 }
2935 else
d9fad198
JH		 2936 len = my_snprintf(tmpbuf, sizeof(tbuf), "_<(%.10s_eval %lu)", code,
2937 (unsigned long)++PL_evalseq);
f4dd75d9 2938 SAVECOPFILE_FREE(&PL_compiling);
57843af0 2939 CopFILE_set(&PL_compiling, tmpbuf+2);
f4dd75d9 2940 SAVECOPLINE(&PL_compiling);
57843af0 2941 CopLINE_set(&PL_compiling, 1);
c277df42
IZ		 2942 /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
2943 deleting the eval's FILEGV from the stash before gv_check() runs
2944 (i.e. before run-time proper). To work around the coredump that
2945 ensues, we always turn GvMULTI_on for any globals that were
2946 introduced within evals. See force_ident(). GSAR 96-10-12 */
f7997f86
NC		 2947 safestr = savepvn(tmpbuf, len);
2948 SAVEDELETE(PL_defstash, safestr, len);
b3ac6de7 2949 SAVEHINTS();
d1ca3daa 2950#ifdef OP_IN_REGISTER
6b88bc9c 2951 PL_opsave = op;
d1ca3daa 2952#else
7766f137 2953 SAVEVPTR(PL_op);
d1ca3daa 2954#endif
c277df42 2955
a3985cdc 2956 /* we get here either during compilation, or via pp_regcomp at runtime */
923e4eb5 2957 runtime = IN_PERL_RUNTIME;
a3985cdc 2958 if (runtime)
d819b83a 2959 runcv = find_runcv(NULL);
a3985cdc 2960
533c011a 2961 PL_op = &dummy;
13b51b79 2962 PL_op->op_type = OP_ENTEREVAL;
533c011a 2963 PL_op->op_flags = 0; /* Avoid uninit warning. */
923e4eb5 2964 PUSHBLOCK(cx, CXt_EVAL|(IN_PERL_COMPILETIME ? 0 : CXp_REAL), SP);
6b75f042 2965 PUSHEVAL(cx, 0);
634d6919
GG		 2966 need_catch = CATCH_GET;
2967 CATCH_SET(TRUE);
a3985cdc
DM		 2968
2969 if (runtime)
410be5db 2970 (void) doeval(G_SCALAR, startop, runcv, PL_curcop->cop_seq);
a3985cdc 2971 else
410be5db 2972 (void) doeval(G_SCALAR, startop, PL_compcv, PL_cop_seqmax);
634d6919 2973 CATCH_SET(need_catch);
13b51b79 2974 POPBLOCK(cx,PL_curpm);
e84b9f1f 2975 POPEVAL(cx);
c277df42
IZ		 2976
2977 (*startop)->op_type = OP_NULL;
22c35a8c 2978 (*startop)->op_ppaddr = PL_ppaddr[OP_NULL];
c277df42 2979 lex_end();
f3548bdc 2980 /* XXX DAPM do this properly one year */
502c6561 2981 *padp = MUTABLE_AV(SvREFCNT_inc_simple(PL_comppad));
d343c3ef 2982 LEAVE_with_name("eval");
923e4eb5 2983 if (IN_PERL_COMPILETIME)
623e6609 2984 CopHINTS_set(&PL_compiling, PL_hints);
d1ca3daa 2985#ifdef OP_IN_REGISTER
6b88bc9c 2986 op = PL_opsave;
d1ca3daa 2987#endif
9d4ba2ae
AL		 2988 PERL_UNUSED_VAR(newsp);
2989 PERL_UNUSED_VAR(optype);
2990
410be5db 2991 return PL_eval_start;
c277df42
IZ		 2992}
2993
a3985cdc
DM		 2994
2995/*
2996=for apidoc find_runcv
2997
2998Locate the CV corresponding to the currently executing sub or eval.
d819b83a
DM		 2999If db_seqp is non_null, skip CVs that are in the DB package and populate
3000*db_seqp with the cop sequence number at the point that the DB:: code was
3001entered. (allows debuggers to eval in the scope of the breakpoint rather
cf525c36 3002than in the scope of the debugger itself).
a3985cdc
DM		 3003
3004=cut
3005*/
3006
3007CV*
d819b83a 3008Perl_find_runcv(pTHX_ U32 *db_seqp)
a3985cdc 3009{
97aff369 3010 dVAR;
a3985cdc 3011 PERL_SI *si;
a3985cdc 3012
d819b83a
DM		 3013 if (db_seqp)
3014 *db_seqp = PL_curcop->cop_seq;
a3985cdc 3015 for (si = PL_curstackinfo; si; si = si->si_prev) {
06b5626a 3016 I32 ix;
a3985cdc 3017 for (ix = si->si_cxix; ix >= 0; ix--) {
06b5626a 3018 const PERL_CONTEXT *cx = &(si->si_cxstack[ix]);
d819b83a 3019 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
1b6737cc 3020 CV * const cv = cx->blk_sub.cv;
d819b83a
DM		 3021 /* skip DB:: code */
3022 if (db_seqp && PL_debstash && CvSTASH(cv) == PL_debstash) {
3023 *db_seqp = cx->blk_oldcop->cop_seq;
3024 continue;
3025 }
3026 return cv;
3027 }
a3985cdc
DM		 3028 else if (CxTYPE(cx) == CXt_EVAL && !CxTRYBLOCK(cx))
3029 return PL_compcv;
3030 }
3031 }
3032 return PL_main_cv;
3033}
3034
3035
27e90453
DM		 3036/* Run yyparse() in a setjmp wrapper. Returns:
3037 * 0: yyparse() successful
3038 * 1: yyparse() failed
3039 * 3: yyparse() died
3040 */
3041STATIC int
3042S_try_yyparse(pTHX)
3043{
3044 int ret;
3045 dJMPENV;
3046
3047 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
3048 JMPENV_PUSH(ret);
3049 switch (ret) {
3050 case 0:
3051 ret = yyparse() ? 1 : 0;
3052 break;
3053 case 3:
3054 break;
3055 default:
3056 JMPENV_POP;
3057 JMPENV_JUMP(ret);
3058 /* NOTREACHED */
3059 }
3060 JMPENV_POP;
3061 return ret;
3062}
3063
3064
a3985cdc
DM		 3065/* Compile a require/do, an eval '', or a /(?{...})/.
3066 * In the last case, startop is non-null, and contains the address of
3067 * a pointer that should be set to the just-compiled code.
3068 * outside is the lexically enclosing CV (if any) that invoked us.
410be5db
DM		 3069 * Returns a bool indicating whether the compile was successful; if so,
3070 * PL_eval_start contains the first op of the compiled ocde; otherwise,
3071 * pushes undef (also croaks if startop != NULL).
a3985cdc
DM		 3072 */
3073
410be5db 3074STATIC bool
a3985cdc 3075S_doeval(pTHX_ int gimme, OP** startop, CV* outside, U32 seq)
a0d0e21e 3076{
27da23d5 3077 dVAR; dSP;
46c461b5 3078 OP * const saveop = PL_op;
27e90453
DM		 3079 bool in_require = (saveop && saveop->op_type == OP_REQUIRE);
3080 int yystatus;
a0d0e21e 3081
27e90453 3082 PL_in_eval = (in_require
6dc8a9e4
IZ		 3083 ? (EVAL_INREQUIRE | (PL_in_eval & EVAL_INEVAL))
3084 : EVAL_INEVAL);
a0d0e21e 3085
1ce6579f 3086 PUSHMARK(SP);
3087
3280af22 3088 SAVESPTR(PL_compcv);
ea726b52 3089 PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
1aff0e91 3090 CvEVAL_on(PL_compcv);
2090ab20
JH		 3091 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
3092 cxstack[cxstack_ix].blk_eval.cv = PL_compcv;
3093
a3985cdc 3094 CvOUTSIDE_SEQ(PL_compcv) = seq;
ea726b52 3095 CvOUTSIDE(PL_compcv) = MUTABLE_CV(SvREFCNT_inc_simple(outside));
a3985cdc 3096
dd2155a4 3097 /* set up a scratch pad */
a0d0e21e 3098
dd2155a4 3099 CvPADLIST(PL_compcv) = pad_new(padnew_SAVE);
cecbe010 3100 PL_op = NULL; /* avoid PL_op and PL_curpad referring to different CVs */
2c05e328 3101
07055b4c 3102
81d86705
NC		 3103 if (!PL_madskills)
3104 SAVEMORTALIZESV(PL_compcv); /* must remain until end of current statement */
748a9306 3105
a0d0e21e
LW		 3106 /* make sure we compile in the right package */
3107
ed094faf 3108 if (CopSTASH_ne(PL_curcop, PL_curstash)) {
3280af22 3109 SAVESPTR(PL_curstash);
ed094faf 3110 PL_curstash = CopSTASH(PL_curcop);
a0d0e21e 3111 }
3c10abe3 3112 /* XXX:ajgo do we really need to alloc an AV for begin/checkunit */
3280af22
NIS		 3113 SAVESPTR(PL_beginav);
3114 PL_beginav = newAV();
3115 SAVEFREESV(PL_beginav);
3c10abe3
AG		 3116 SAVESPTR(PL_unitcheckav);
3117 PL_unitcheckav = newAV();
3118 SAVEFREESV(PL_unitcheckav);
a0d0e21e 3119
81d86705 3120#ifdef PERL_MAD
9da243ce 3121 SAVEBOOL(PL_madskills);
81d86705
NC		 3122 PL_madskills = 0;
3123#endif
3124
a0d0e21e
LW		 3125 /* try to compile it */
3126
5f66b61c 3127 PL_eval_root = NULL;
3280af22 3128 PL_curcop = &PL_compiling;
fc15ae8f 3129 CopARYBASE_set(PL_curcop, 0);
5f66b61c 3130 if (saveop && (saveop->op_type != OP_REQUIRE) && (saveop->op_flags & OPf_SPECIAL))
faef0170 3131 PL_in_eval |= EVAL_KEEPERR;
ab69dbc2
RGS		 3132 else
3133 CLEAR_ERRSV();
27e90453 3134
52db365a
BM		 3135 CALL_BLOCK_HOOKS(eval, saveop);
3136
27e90453
DM		 3137 /* note that yyparse() may raise an exception, e.g. C<BEGIN{die}>,
3138 * so honour CATCH_GET and trap it here if necessary */
3139
3140 yystatus = (!in_require && CATCH_GET) ? S_try_yyparse(aTHX) : yyparse();
3141
3142 if (yystatus || PL_parser->error_count || !PL_eval_root) {
0c58d367 3143 SV **newsp; /* Used by POPBLOCK. */
b6494f15 3144 PERL_CONTEXT *cx = NULL;
27e90453 3145 I32 optype; /* Used by POPEVAL. */
b6494f15 3146 SV *namesv = NULL;
9d4ba2ae 3147 const char *msg;
bfed75c6 3148
27e90453
DM		 3149 PERL_UNUSED_VAR(newsp);
3150 PERL_UNUSED_VAR(optype);
3151
c86ffc32
DM		 3152 /* note that if yystatus == 3, then the EVAL CX block has already
3153 * been popped, and various vars restored */
533c011a 3154 PL_op = saveop;
27e90453 3155 if (yystatus != 3) {
c86ffc32
DM		 3156 if (PL_eval_root) {
3157 op_free(PL_eval_root);
3158 PL_eval_root = NULL;
3159 }
27e90453
DM		 3160 SP = PL_stack_base + POPMARK; /* pop original mark */
3161 if (!startop) {
3162 POPBLOCK(cx,PL_curpm);
3163 POPEVAL(cx);
b6494f15 3164 namesv = cx->blk_eval.old_namesv;
27e90453 3165 }
c277df42 3166 }
a0d0e21e 3167 lex_end();
27e90453
DM		 3168 if (yystatus != 3)
3169 LEAVE_with_name("eval"); /* pp_entereval knows about this LEAVE. */
9d4ba2ae
AL		 3170
3171 msg = SvPVx_nolen_const(ERRSV);
27e90453 3172 if (in_require) {
b6494f15
VP		 3173 if (!cx) {
3174 /* If cx is still NULL, it means that we didn't go in the
3175 * POPEVAL branch. */
3176 cx = &cxstack[cxstack_ix];
3177 assert(CxTYPE(cx) == CXt_EVAL);
3178 namesv = cx->blk_eval.old_namesv;
3179 }
3180 (void)hv_store(GvHVn(PL_incgv),
3181 SvPVX_const(namesv), SvCUR(namesv),
3182 &PL_sv_undef, 0);
58d3fd3b
SH		 3183 Perl_croak(aTHX_ "%sCompilation failed in require",
3184 *msg ? msg : "Unknown error\n");
5a844595
GS		 3185 }
3186 else if (startop) {
27e90453
DM		 3187 if (yystatus != 3) {
3188 POPBLOCK(cx,PL_curpm);
3189 POPEVAL(cx);
3190 }
5a844595
GS		 3191 Perl_croak(aTHX_ "%sCompilation failed in regexp",
3192 (*msg ? msg : "Unknown error\n"));
7a2e2cd6 3193 }
9d7f88dd 3194 else {
9d7f88dd 3195 if (!*msg) {
6502358f 3196 sv_setpvs(ERRSV, "Compilation error");
9d7f88dd
SR		 3197 }
3198 }
410be5db
DM		 3199 PUSHs(&PL_sv_undef);
3200 PUTBACK;
3201 return FALSE;
a0d0e21e 3202 }
57843af0 3203 CopLINE_set(&PL_compiling, 0);
c277df42 3204 if (startop) {
3280af22 3205 *startop = PL_eval_root;
c277df42 3206 } else
3280af22 3207 SAVEFREEOP(PL_eval_root);
0c58d367
RGS		 3208
3209 /* Set the context for this new optree.
021f53de
GG		 3210 * Propagate the context from the eval(). */
3211 if ((gimme & G_WANT) == G_VOID)
3280af22 3212 scalarvoid(PL_eval_root);
7df0357e 3213 else if ((gimme & G_WANT) == G_ARRAY)
3280af22 3214 list(PL_eval_root);
a0d0e21e 3215 else
3280af22 3216 scalar(PL_eval_root);
a0d0e21e
LW		 3217
3218 DEBUG_x(dump_eval());
3219
55497cff 3220 /* Register with debugger: */
6482a30d 3221 if (PERLDB_INTER && saveop && saveop->op_type == OP_REQUIRE) {
b96d8cd9 3222 CV * const cv = get_cvs("DB::postponed", 0);
55497cff 3223 if (cv) {
3224 dSP;
924508f0 3225 PUSHMARK(SP);
ad64d0ec 3226 XPUSHs(MUTABLE_SV(CopFILEGV(&PL_compiling)));
55497cff 3227 PUTBACK;
ad64d0ec 3228 call_sv(MUTABLE_SV(cv), G_DISCARD);
55497cff 3229 }
3230 }
3231
3c10abe3
AG		 3232 if (PL_unitcheckav)
3233 call_list(PL_scopestack_ix, PL_unitcheckav);
3234
a0d0e21e
LW		 3235 /* compiled okay, so do it */
3236
3280af22
NIS		 3237 CvDEPTH(PL_compcv) = 1;
3238 SP = PL_stack_base + POPMARK; /* pop original mark */
533c011a 3239 PL_op = saveop; /* The caller may need it. */
bc177e6b 3240 PL_parser->lex_state = LEX_NOTPARSING; /* $^S needs this. */
5dc0d613 3241
410be5db
DM		 3242 PUTBACK;
3243 return TRUE;
a0d0e21e
LW		 3244}
3245
a6c40364 3246STATIC PerlIO *
0786552a 3247S_check_type_and_open(pTHX_ const char *name)
ce8abf5f
SP		 3248{
3249 Stat_t st;
c445ea15 3250 const int st_rc = PerlLIO_stat(name, &st);
df528165 3251
7918f24d
NC		 3252 PERL_ARGS_ASSERT_CHECK_TYPE_AND_OPEN;
3253
6b845e56 3254 if (st_rc < 0 || S_ISDIR(st.st_mode) || S_ISBLK(st.st_mode)) {
4608196e 3255 return NULL;
ce8abf5f
SP		 3256 }
3257
0786552a 3258 return PerlIO_open(name, PERL_SCRIPT_MODE);
ce8abf5f
SP		 3259}
3260
75c20bac 3261#ifndef PERL_DISABLE_PMC
ce8abf5f 3262STATIC PerlIO *
0786552a 3263S_doopen_pm(pTHX_ const char *name, const STRLEN namelen)
b295d113 3264{
b295d113
TH		 3265 PerlIO *fp;
3266
7918f24d
NC		 3267 PERL_ARGS_ASSERT_DOOPEN_PM;
3268
ce9440c8 3269 if (namelen > 3 && memEQs(name + namelen - 3, 3, ".pm")) {
50b8ed39
NC		 3270 SV *const pmcsv = newSV(namelen + 2);
3271 char *const pmc = SvPVX(pmcsv);
a6c40364 3272 Stat_t pmcstat;
50b8ed39
NC		 3273
3274 memcpy(pmc, name, namelen);
3275 pmc[namelen] = 'c';
3276 pmc[namelen + 1] = '\0';
3277
a6c40364 3278 if (PerlLIO_stat(pmc, &pmcstat) < 0) {
0786552a 3279 fp = check_type_and_open(name);
a6c40364
GS		 3280 }
3281 else {
0786552a 3282 fp = check_type_and_open(pmc);
b295d113 3283 }
a6c40364
GS		 3284 SvREFCNT_dec(pmcsv);
3285 }
3286 else {
0786552a 3287 fp = check_type_and_open(name);
b295d113 3288 }
b295d113 3289 return fp;
75c20bac 3290}
7925835c 3291#else
75c20bac 3292# define doopen_pm(name, namelen) check_type_and_open(name)
7925835c 3293#endif /* !PERL_DISABLE_PMC */
b295d113 3294
a0d0e21e
LW		 3295PP(pp_require)
3296{
27da23d5 3297 dVAR; dSP;
c09156bb 3298 register PERL_CONTEXT *cx;
a0d0e21e 3299 SV *sv;
5c144d81 3300 const char *name;
6132ea6c 3301 STRLEN len;
4492be7a
JM		 3302 char * unixname;
3303 STRLEN unixlen;
62f5ad7a 3304#ifdef VMS
4492be7a 3305 int vms_unixname = 0;
62f5ad7a 3306#endif
c445ea15
AL		 3307 const char *tryname = NULL;
3308 SV *namesv = NULL;
f54cb97a 3309 const I32 gimme = GIMME_V;
bbed91b5 3310 int filter_has_file = 0;
c445ea15 3311 PerlIO *tryrsfp = NULL;
34113e50 3312 SV *filter_cache = NULL;
c445ea15
AL		 3313 SV *filter_state = NULL;
3314 SV *filter_sub = NULL;
3315 SV *hook_sv = NULL;
6ec9efec
JH		 3316 SV *encoding;
3317 OP *op;
a0d0e21e
LW		 3318
3319 sv = POPs;
d7aa5382 3320 if ( (SvNIOKp(sv) || SvVOK(sv)) && PL_op->op_type != OP_DOFILE) {
d7aa5382
JP		 3321 sv = new_version(sv);
3322 if (!sv_derived_from(PL_patchlevel, "version"))
ac0e6a2f 3323 upg_version(PL_patchlevel, TRUE);
149c1637 3324 if (cUNOP->op_first->op_type == OP_CONST && cUNOP->op_first->op_private & OPpCONST_NOVER) {
3cacfbb9 3325 if ( vcmp(sv,PL_patchlevel) <= 0 )
468aa647 3326 DIE(aTHX_ "Perls since %"SVf" too modern--this is %"SVf", stopped",
be2597df 3327 SVfARG(vnormal(sv)), SVfARG(vnormal(PL_patchlevel)));
468aa647
RGS		 3328 }
3329 else {
d1029faa
JP		 3330 if ( vcmp(sv,PL_patchlevel) > 0 ) {
3331 I32 first = 0;
3332 AV *lav;
3333 SV * const req = SvRV(sv);
85fbaab2 3334 SV * const pv = *hv_fetchs(MUTABLE_HV(req), "original", FALSE);
d1029faa
JP		 3335
3336 /* get the left hand term */
502c6561 3337 lav = MUTABLE_AV(SvRV(*hv_fetchs(MUTABLE_HV(req), "version", FALSE)));
d1029faa
JP		 3338
3339 first = SvIV(*av_fetch(lav,0,0));
3340 if ( first > (int)PERL_REVISION /* probably 'use 6.0' */
85fbaab2 3341 || hv_exists(MUTABLE_HV(req), "qv", 2 ) /* qv style */
d1029faa
JP		 3342 || av_len(lav) > 1 /* FP with > 3 digits */
3343 || strstr(SvPVX(pv),".0") /* FP with leading 0 */
3344 ) {
3345 DIE(aTHX_ "Perl %"SVf" required--this is only "
3346 "%"SVf", stopped", SVfARG(vnormal(req)),
3347 SVfARG(vnormal(PL_patchlevel)));
3348 }
3349 else { /* probably 'use 5.10' or 'use 5.8' */
af61dbfd 3350 SV *hintsv;
d1029faa
JP		 3351 I32 second = 0;
3352
3353 if (av_len(lav)>=1)
3354 second = SvIV(*av_fetch(lav,1,0));
3355
3356 second /= second >= 600 ? 100 : 10;
af61dbfd
NC		 3357 hintsv = Perl_newSVpvf(aTHX_ "v%d.%d.0",
3358 (int)first, (int)second);
d1029faa
JP		 3359 upg_version(hintsv, TRUE);
3360
3361 DIE(aTHX_ "Perl %"SVf" required (did you mean %"SVf"?)"
3362 "--this is only %"SVf", stopped",
3363 SVfARG(vnormal(req)),
af61dbfd 3364 SVfARG(vnormal(sv_2mortal(hintsv))),
d1029faa
JP		 3365 SVfARG(vnormal(PL_patchlevel)));
3366 }
3367 }
468aa647 3368 }
d7aa5382 3369
faee19b5 3370 /* We do this only with "use", not "require" or "no". */
da8fb5d8
DG		 3371 if (PL_compcv && !(cUNOP->op_first->op_private & OPpCONST_NOVER)) {
3372 /* If we request a version >= 5.9.5, load feature.pm with the
3373 * feature bundle that corresponds to the required version. */
3374 if (vcmp(sv, sv_2mortal(upg_version(newSVnv(5.009005), FALSE))) >= 0) {
3375 SV *const importsv = vnormal(sv);
3376 *SvPVX_mutable(importsv) = ':';
3377 ENTER_with_name("load_feature");
3378 Perl_load_module(aTHX_ 0, newSVpvs("feature"), NULL, importsv, NULL);
3379 LEAVE_with_name("load_feature");
3380 }
3381 /* If a version >= 5.11.0 is requested, strictures are on by default! */
3382 if (vcmp(sv, sv_2mortal(upg_version(newSVnv(5.011000), FALSE))) >= 0) {
3383 PL_hints |= (HINT_STRICT_REFS | HINT_STRICT_SUBS | HINT_STRICT_VARS);
3384 }
53eb19dd
S		 3385 }
3386
7dfde25d 3387 RETPUSHYES;
a0d0e21e 3388 }
5c144d81 3389 name = SvPV_const(sv, len);
6132ea6c 3390 if (!(name && len > 0 && *name))
cea2e8a9 3391 DIE(aTHX_ "Null filename used");
4633a7c4 3392 TAINT_PROPER("require");
4492be7a
JM		 3393